task_url stringlengths 30 116 | task_name stringlengths 2 86 | task_description stringlengths 0 14.4k | language_url stringlengths 2 53 | language_name stringlengths 1 52 | code stringlengths 0 61.9k |
|---|---|---|---|---|---|
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Ring | Ring |
see split("gHHH5YY++///\")
func split(s )
c =left (s, 1)
split = ""
for i = 1 to len(s)
d = substr(s, i, 1)
if d != c
split = split + ", "
c = d
ok
split = split + d
next
return split
|
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Ruby | Ruby | def split(str)
puts " input string: #{str}"
s = str.chars.chunk(&:itself).map{|_,a| a.join}.join(", ")
puts "output string: #{s}"
s
end
split("gHHH5YY++///\\") |
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #Erlang | Erlang | -module(stack).
-export([empty/1, new/0, pop/1, push/2, top/1]).
new() -> [].
empty([]) -> true;
empty(_) -> false.
pop([H|T]) -> {H,T}.
push(H,T) -> [H|T].
top([H|_]) -> H. |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #Common_Lisp | Common Lisp | (defun spiral (rows columns)
(do ((N (* rows columns))
(spiral (make-array (list rows columns) :initial-element nil))
(dx 1) (dy 0) (x 0) (y 0)
(i 0 (1+ i)))
((= i N) spiral)
(setf (aref spiral y x) i)
(let ((nx (+ x dx)) (ny (+ y dy)))
(cond
((and (< -1 nx columns)
... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #M2000_Interpreter | M2000 Interpreter |
Module Checkit {
Let inkey$="hello", dir$="Something Else"
\\ using a dot we tell to interpreter to skip internal identifiers,
\\ and look for user variables
Print .inkey$="hello", .dir$="Something Else"
Print dir$ ' return current path
do
Print "wait to press space... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | Grid[Partition[Names["$*"],4]]
->
$Aborted $ActivationGroupID $ActivationKey $ActivationUserRegistered
$AddOnsDirectory $AllowDataUpdates $AllowDocumentationUpdates $AllowInternet
$AssertFunction $Assump... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #Maxima | Maxima | /* There are many special variables in Maxima: more than 250 are used for options, for example */
fpprec; /* precision for big floats */
obase; /* number base for output */
/* Other variables are read-only, and give the list of user-defined variables, functions... */
infolists; /* give the names of all available l... |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Erlang | Erlang |
10 \ single cell number
-10 \ negative single cell number
10. \ double cell number
10e \ floating-point number |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Forth | Forth |
10 \ single cell number
-10 \ negative single cell number
10. \ double cell number
10e \ floating-point number |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #AutoHotkey | AutoHotkey | StoogeSort(L, i:=1, j:=""){
if !j
j := L.MaxIndex()
if (L[j] < L[i]){
temp := L[i]
L[i] := L[j]
L[j] := temp
}
if (j - i > 1){
t := floor((j - i + 1)/3)
StoogeSort(L, i, j-t)
StoogeSort(L, i+t, j)
StoogeSort(L, i, j-t)
}
return L
} |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Brainf.2A.2A.2A | Brainf*** |
>>>>>,----------[++++++++
++[->+>+<<]>+>[-<<+>>]+++
+++++[-<------>]>>+>,----
------<<+[->>>>>+<<<<<]>>
]>>>[<<<<[<<<[->>+<<[->+>
[-]<<]]>[-<+>]>[-<<<.>>>>
->>>>>[>>>>>]<-<<<<[<<<<<
]+<]<<<<]>>>>>[>>>>>]<]
|
http://rosettacode.org/wiki/Soundex | Soundex | Soundex is an algorithm for creating indices for words based on their pronunciation.
Task
The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling (from the soundex Wikipedia article).
Caution
There is a major issue in many of the ... | #11l | 11l | V inv_code = [
‘1’ = [‘B’, ‘F’, ‘P’, ‘V’],
‘2’ = [‘C’, ‘G’, ‘J’, ‘K’, ‘Q’, ‘S’, ‘X’, ‘Z’],
‘3’ = [‘D’, ‘T’],
‘4’ = [‘L’],
‘5’ = [‘M’, ‘N’],
‘6’ = [‘R’]
]
[Char = Char] _code
L(k, arr) inv_code
L(el) arr
_code[el] = k
F soundex(s)
V code = String(s[0].uppercase())
V previous = :_code... |
http://rosettacode.org/wiki/Sorting_algorithms/Shell_sort | Sorting algorithms/Shell sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Ada | Ada | generic
type Element_Type is digits <>;
type Index_Type is (<>);
type Array_Type is array(Index_Type range <>) of Element_Type;
package Shell_Sort is
procedure Sort(Item : in out Array_Type);
end Shell_Sort; |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #Factor | Factor | USING: formatting kernel math math.order math.parser
math.statistics sequences splitting ;
: sparkline-index ( v min max -- i )
[ drop - 8 * ] [ swap - /i ] 2bi 0 7 clamp 9601 + ;
: (sparkline) ( seq -- new-seq )
dup minmax [ sparkline-index ] 2curry "" map-as ;
: sparkline ( str -- new-str )
", " spl... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #jq | jq | # merge input array with array x by comparing the heads of the arrays
# in turn; # if both arrays are sorted, the result will be sorted:
def merge(x):
length as $length
| (x|length) as $xl
| if $length == 0 then x
elif $xl == 0 then .
else
. as $in
| reduce range(0; $xl + $length) as $z
... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Julia | Julia | function mergelist(a, b)
out = Vector{Int}()
while !isempty(a) && !isempty(b)
if a[1] < b[1]
push!(out, popfirst!(a))
else
push!(out, popfirst!(b))
end
end
append!(out, a)
append!(out, b)
out
end
function strand(a)
i, s = 1, [popfirst!(a)]
... |
http://rosettacode.org/wiki/Stable_marriage_problem | Stable marriage problem | Solve the Stable marriage problem using the Gale/Shapley algorithm.
Problem description
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each woman ranks all the men in order of her preference.
A stable set of engagements for marriage is o... | #Java | Java | import java.util.*;
public class Stable {
static List<String> guys = Arrays.asList(
new String[]{
"abe", "bob", "col", "dan", "ed", "fred", "gav", "hal", "ian", "jon"});
static List<String> girls = Arrays.asList(
new String[]{
"abi", "bea", "cath", "dee", "eve", "fay", ... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #Tcl | Tcl | proc squaregen {{i 0}} {
proc squaregen "{i [incr i]}" [info body squaregen]
expr $i * $i
}
proc is_cube {n} {
for {set i 1} {($i * $i * $i) < $n} {incr i} { }
expr ($i * $i * $i) == $n
}
set cubes {}
set noncubes {}
for {set s [squaregen]} {[llength $noncubes] < 30} {set s [squaregen]} {
if [is_cube $s] ... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Rust | Rust | fn splitter(string: &str) -> String {
let chars: Vec<_> = string.chars().collect();
let mut result = Vec::new();
let mut last_mismatch = 0;
for i in 0..chars.len() {
if chars.len() == 1 {
return chars[0..1].iter().collect();
}
if i > 0 && chars[i-1] != chars[i] {
... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Scala | Scala | // Split a (character) string into comma (plus a blank) delimited strings
// based on a change of character (left to right).
// See https://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character#Scala
def runLengthSplit(s: String): String = /// Add a guard letter
(s + 'X').sliding(2).map(pair =>... |
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #F.23 | F# | type Stack<'a> //'//(workaround for syntax highlighting problem)
(?items) =
let items = defaultArg items []
member x.Push(A) = Stack(A::items)
member x.Pop() =
match items with
| x::xr -> (x, Stack(xr))
| [] -> failwith "Stack is empty."
member x.IsEmpty() = items = []
// example usag... |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #D | D | void main() {
import std.stdio;
enum n = 5;
int[n][n] M;
int pos, side = n;
foreach (immutable i; 0 .. n / 2 + n % 2) {
foreach (immutable j; 0 .. side)
M[i][i + j] = pos++;
foreach (immutable j; 1 .. side)
M[i + j][n - 1 - i] = pos++;
foreach_revers... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #ML.2FI | ML/I | MCSKIP "WITH" NL
"" Special variables
"" There are four different kinds of variables in ML/I.
"" Permanent (P) variables - these have no special predefined values.
"" Character (C) variables - these have no special predefined values.
"" Temporary (T) variables - a macro has at least three of these, and
"" those have... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #Nanoquery | Nanoquery | println dumpstack() |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Fortran | Fortran | C or c in column one mark a comment line.
D or d in column one mark a debugging statement, ignored or compiled according to an option set at compile time.
* in column one for compiler control statements (e.g. Fortran II, Fortran IV)
0 in column six does not indicate a continuation line, even though not a blank.
... |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #FreeBASIC | FreeBASIC | -- comment here until end of line
{- comment here -} |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #BASIC | BASIC | DECLARE SUB stoogesort (L() AS LONG, i AS LONG, j AS LONG)
RANDOMIZE TIMER
CONST arraysize = 10
DIM x(arraysize) AS LONG
DIM i AS LONG
PRINT "Before: ";
FOR i = 0 TO arraysize
x(i) = INT(RND * 100)
PRINT x(i); " ";
NEXT
PRINT
stoogesort x(), 0, arraysize
PRINT "After: ";
FOR i = 0 TO arraysize
P... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #C | C | #include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
int main(int c, char **v)
{
while (--c > 1 && !fork());
sleep(c = atoi(v[c]));
printf("%d\n", c);
wait(0);
return 0;
} |
http://rosettacode.org/wiki/Soundex | Soundex | Soundex is an algorithm for creating indices for words based on their pronunciation.
Task
The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling (from the soundex Wikipedia article).
Caution
There is a major issue in many of the ... | #360_Assembly | 360 Assembly | * Soundex 02/04/2017
SOUNDEX CSECT
USING SOUNDEX,R13 base register
B 72(R15) skip savearea
DC 17F'0' savearea
STM R14,R12,12(R13) save previous context
ST R13,4(R15) link backward
ST... |
http://rosettacode.org/wiki/Sorting_algorithms/Shell_sort | Sorting algorithms/Shell sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #ALGOL_68 | ALGOL 68 | # -*- coding: utf-8 -*- #
COMMENT
REQUIRES(
MODE SORTELEMENT = mode of element of array to be sorted...
OP < = (SORTELEMENT a, b)BOOL: a < b;
)
END COMMENT
MODE SORTELEMENTCMP = PROC(SORTELEMENT,SORTELEMENT)BOOL;
# create a global sort procedure for convenience #
PROC(SORTELEMENT,SORTELEMENT)BOOL sor... |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #FALSE | FALSE | {
variables:
s: sign (1 or -1)
u: current number
f: current number fraction length
v: current number is valid
t: number of numbers read
x: biggest fraction
y: smallest number (without fraction)
z: biggest number (without fraction)
}
{function a: test if top is 0-9, without popping the value, codes 4... |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #Go | Go | package main
import (
"bufio"
"errors"
"fmt"
"math"
"os"
"regexp"
"strconv"
"strings"
)
func main() {
fmt.Println("Numbers please separated by space/commas:")
sc := bufio.NewScanner(os.Stdin)
sc.Scan()
s, n, min, max, err := spark(sc.Text())
if err != nil {
... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Kotlin | Kotlin | // version 1.1.2
fun <T : Comparable<T>> strandSort(l: List<T>): List<T> {
fun merge(left: MutableList<T>, right: MutableList<T>): MutableList<T> {
val res = mutableListOf<T>()
while (!left.isEmpty() && !right.isEmpty()) {
if (left[0] <= right[0]) {
res.add(left[0])
... |
http://rosettacode.org/wiki/Stable_marriage_problem | Stable marriage problem | Solve the Stable marriage problem using the Gale/Shapley algorithm.
Problem description
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each woman ranks all the men in order of her preference.
A stable set of engagements for marriage is o... | #JavaScript | JavaScript | function Person(name) {
var candidateIndex = 0;
this.name = name;
this.fiance = null;
this.candidates = [];
this.rank = function(p) {
for (i = 0; i < this.candidates.length; i++)
if (this.candidates[i] === p) return i;
return this.candidates.length + 1;
}
... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #UNIX_Shell | UNIX Shell | # First 30 positive integers which are squares but not cubes
# also, the first 3 positive integers which are both squares and cubes
######
# main #
######
integer n sq cr cnt=0
for (( n=1; cnt<30; n++ )); do
(( sq = n * n ))
(( cr = cbrt(sq) ))
if (( (cr * cr * cr) != sq )); then
(( cnt++ ))
print ${sq}... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #Visual_Basic_.NET | Visual Basic .NET | Module Module1
' flag / mask explanation:
' bit 0 (1) = increment square
' bit 1 (2) = increment cube
' bit 2 (4) = has output
' Checks flag against mask, then advances mask.
Function ChkFlg(flag As Integer, ByRef mask As Integer) As Boolean
ChkFlg = (flag And mask) = mask : mask <<= 1
End Func... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Sed | Sed | echo 'gHHH5YY++///\' | sed 's/\(.\)\1*/&, /g;s/, $//' |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Sidef | Sidef | func group(str) {
gather {
while (var match = (str =~ /((.)\g{-1}*)/g)) {
take(match[0])
}
}
}
say group(ARGV[0] \\ 'gHHH5YY++///\\').join(', ') |
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #Factor | Factor | V{ 1 2 3 } {
[ 6 swap push ]
[ "hi" swap push ]
[ "Vector is now: " write . ]
[ "Let's pop it: " write pop . ]
[ "Vector is now: " write . ]
[ "Top is: " write last . ] } cleave
Vector is now: V{ 1 2 3 6 "hi" }
Let's pop it: "hi"
Vector is now: V{ 1 2 3 6 }
Top is: 6 |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #DCL | DCL | $ p1 = f$integer( p1 )
$ max = p1 * p1
$
$ i = 0
$ r = 1
$ rd = 0
$ c = 1
$ cd = 1
$ loop:
$ a'r'_'c' = i
$ nr = r + rd
$ nc = c + cd
$ if nr .eq. 0 .or. nc .eq. 0 .or. nr .gt. p1 .or. nc .gt. p1 .or. f$type( a'nr'_'nc' ) .nes. ""
$ then
$ gosub change_directions
$ endif
$ r = r + rd
$ c = c + cd
$ i = i + 1... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #NetRexx | NetRexx | /* NetRexx */
options replace format comments java crossref savelog symbols binary
class RCSpecialVariables
method RCSpecialVariables()
x = super.toString
y = this.toString
say '<super>'x'</super>'
say '<this>'y'</this>'
say '<class>'RCSpecialVariables.class'</class>'
say '<digits>'digits'</digits>'
s... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #Nim | Nim | result = value
return |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Gambas | Gambas | -- comment here until end of line
{- comment here -} |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Go | Go | -- comment here until end of line
{- comment here -} |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #BBC_BASIC | BBC BASIC | DIM test%(9)
test%() = 4, 65, 2, -31, 0, 99, 2, 83, 782, 1
PROCstoogesort(test%(), 0, DIM(test%(),1))
FOR i% = 0 TO 9
PRINT test%(i%) ;
NEXT
PRINT
END
DEF PROCstoogesort(l%(), i%, j%)
LOCAL t%
IF l%(j%) < l%(i%) SWAP l%(i%), l%(j%)
IF j% - i% >... |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #BCPL | BCPL | get "libhdr"
let stoogesort(L, i, j) be
$( if L!j < L!i then
$( let x = L!i
L!i := L!j
L!j := x
$)
if j-i>1 then
$( let t = (j - i + 1)/3
stoogesort(L, i, j-t)
stoogesort(L, i+t, j)
stoogesort(L, i, j-t)
$)
$)
let write(s, A, len) be
$( writes(s)
f... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #C.23 | C# | using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
class Program
{
static void ThreadStart(object item)
{
Thread.Sleep(1000 * (int)item);
Console.WriteLine(item);
}
static void SleepSort(IEnumerable<int> items)
{
foreach (var item i... |
http://rosettacode.org/wiki/Sorting_algorithms/Selection_sort | Sorting algorithms/Selection sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #11l | 11l | F selection_sort(&lst)
L(e) lst
V mn = min(L.index .< lst.len, key' x -> @lst[x])
(lst[L.index], lst[mn]) = (lst[mn], e)
V arr = [7, 6, 5, 9, 8, 4, 3, 1, 2, 0]
selection_sort(&arr)
print(arr) |
http://rosettacode.org/wiki/Soundex | Soundex | Soundex is an algorithm for creating indices for words based on their pronunciation.
Task
The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling (from the soundex Wikipedia article).
Caution
There is a major issue in many of the ... | #Ada | Ada | with Ada.Text_IO; use Ada.Text_IO;
with Ada.Strings.Unbounded; use Ada.Strings.Unbounded;
with Ada.Characters.Handling; use Ada.Characters.Handling;
procedure Soundex is
type UStrings is array(Natural range <>) of Unbounded_String;
function "+"(S:String) return Unbounded_String renames To_Unbounded_String;
f... |
http://rosettacode.org/wiki/Sorting_algorithms/Shell_sort | Sorting algorithms/Shell sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #AppleScript | AppleScript | -- In-place Shell sort.
-- Algorithm: Donald Shell, 1959.
on ShellSort(theList, l, r) -- Sort items l thru r of theList.
set listLength to (count theList)
if (listLength < 2) then return
-- Convert negative and/or transposed range indices.
if (l < 0) then set l to listLength + l + 1
if (r < 0) then ... |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #Groovy | Groovy | def sparkline(List<Number> list) {
def (min, max) = [list.min(), list.max()]
def div = (max - min) / 7
list.collect { (char)(0x2581 + (it-min) * div) }.join()
}
def sparkline(String text) { sparkline(text.split(/[ ,]+/).collect { it as Double }) } |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | StrandSort[ input_ ] := Module[ {results = {}, A = input},
While[Length@A > 0,
sublist = {A[[1]]}; A = A[[2;;All]];
For[i = 1, i < Length@A, i++,
If[ A[[i]] > Last@sublist, AppendTo[sublist, A[[i]]]; A = Delete[A, i];]
];
results = #[[Ordering@#]]&@Join[sublist, results];];
results ]
StrandSort[{2, 3, 7, 5, 1... |
http://rosettacode.org/wiki/Stable_marriage_problem | Stable marriage problem | Solve the Stable marriage problem using the Gale/Shapley algorithm.
Problem description
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each woman ranks all the men in order of her preference.
A stable set of engagements for marriage is o... | #Julia | Julia |
# This is not optimized, but tries to follow the pseudocode given the Wikipedia entry below.
# Reference: https://en.wikipedia.org/wiki/Stable_marriage_problem#Algorithm
const males = ["abe", "bob", "col", "dan", "ed", "fred", "gav", "hal", "ian", "jon"]
const females = ["abi", "bea", "cath", "dee", "eve", "fay", "... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #VTL-2 | VTL-2 | 10 N=0
20 S=1
30 C=1
40 #=60
50 C=C+1
60 #=C*C*C<(S*S)*50
70 #=C*C*C=(S*S)*110
80 N=N+1
90 ?=S*S
100 $=32
110 S=S+1
120 #=N<30*60 |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #Wren | Wren | import "/math" for Math
import "/fmt" for Fmt
var i = 1
var sqnc = [] // squares not cubes
var sqcb = [] // squares and cubes
while (sqnc.count < 30 || sqcb.count < 3) {
var sq = i * i
var cb = Math.cbrt(sq).round
if (cb*cb*cb != sq) {
sqnc.add(sq)
} else {
sqcb.add(sq)
}
i =... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #SNOBOL4 | SNOBOL4 |
* Program: split_on_change_of_character.sbl
* To run: sbl split_on_change_of_character.sbl
* Description: Split a (character) string into comma (plus a blank)
* delimited strings based on a change of character (left to right).
*
* Blanks should be treated as any other character
* (except they are problematic to dis... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Standard_ML | Standard ML | (*
* Head-Tail implementation of grouping
*)
fun group' ac nil = [ac]
| group' nil (y::ys) = group' [y] ys
| group' (x::ac) (y::ys) = if x=y then group' (y::x::ac) ys else (x::ac) :: group' [y] ys
fun group xs = group' nil xs
fun groupString str = String.concatWith ", " (map implode (group (explo... |
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #Forth | Forth | : stack ( size -- )
create here cell+ , cells allot ;
: push ( n st -- ) tuck @ ! cell swap +! ;
: pop ( st -- n ) -cell over +! @ @ ;
: empty? ( st -- ? ) dup @ - cell+ 0= ;
10 stack st
1 st push
2 st push
3 st push
st empty? . \ 0 (false)
st pop . st pop . st pop . \ 3 2 1
st empty? . \ -1 (true) |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #E | E | /** Missing scalar multiplication, but we don't need it. */
def makeVector2(x, y) {
return def vector {
to x() { return x }
to y() { return y }
to add(other) { return makeVector2(x + other.x(), y + other.y()) }
to clockwise() { return makeVector2(-y, x) }
}
}
/** Bugs: (1) The printing is speciali... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #OASYS | OASYS | val argv : string array
(** The command line arguments given to the process.
The first element is the command name used to invoke the program.
The following elements are the command-line arguments
given to the program. *)
val executable_name : string
(** The name of the file containing the executable current... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #OASYS_Assembler | OASYS Assembler | val argv : string array
(** The command line arguments given to the process.
The first element is the command name used to invoke the program.
The following elements are the command-line arguments
given to the program. *)
val executable_name : string
(** The name of the file containing the executable current... |
http://rosettacode.org/wiki/Sorting_algorithms/Permutation_sort | Sorting algorithms/Permutation sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #11l | 11l | F is_sorted(arr)
L(i) 1..arr.len-1
I arr[i-1] > arr[i]
R 0B
R 1B
F permutation_sort(&arr)
L !is_sorted(arr)
arr.next_permutation()
V arr = [7, 6, 5, 9, 8, 4, 3, 1, 2, 0]
permutation_sort(&arr)
print(arr) |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #GUISS | GUISS | -- comment here until end of line
{- comment here -} |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #Haskell | Haskell | -- comment here until end of line
{- comment here -} |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #C | C | #include <stdio.h>
#define SWAP(r,s) do{ t=r; r=s; s=t; } while(0)
void StoogeSort(int a[], int i, int j)
{
int t;
if (a[j] < a[i]) SWAP(a[i], a[j]);
if (j - i > 1)
{
t = (j - i + 1) / 3;
StoogeSort(a, i, j - t);
StoogeSort(a, i + t, j);
StoogeSort(a, i, j - t);
}
}
... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #C.2B.2B | C++ |
#include <chrono>
#include <iostream>
#include <thread>
#include <vector>
int main(int argc, char* argv[]) {
std::vector<std::thread> threads;
for (int i = 1; i < argc; ++i) {
threads.emplace_back([i, &argv]() {
int arg = std::stoi(argv[i]);
std::this_thread::sleep_for(std::chrono::seconds(arg... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Clojure | Clojure | (ns sleepsort.core
(require [clojure.core.async :as async :refer [chan go <! <!! >! timeout]]))
(defn sleep-sort [l]
(let [c (chan (count l))]
(doseq [i l]
(go (<! (timeout (* 1000 i)))
(>! c i)))
(<!! (async/into [] (async/take (count l) c))))) |
http://rosettacode.org/wiki/Sorting_algorithms/Selection_sort | Sorting algorithms/Selection sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #360_Assembly | 360 Assembly | * Selection sort 26/06/2016
SELECSRT CSECT
USING SELECSRT,R13 base register
B 72(R15) skip savearea
DC 17F'0' savearea
STM R14,R12,12(R13) prolog
ST R13,4(R15) "
ST R15,8(R13) "
... |
http://rosettacode.org/wiki/Soundex | Soundex | Soundex is an algorithm for creating indices for words based on their pronunciation.
Task
The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling (from the soundex Wikipedia article).
Caution
There is a major issue in many of the ... | #ALGOL_68 | ALGOL 68 | PROC soundex = (STRING s) STRING:
BEGIN
PROC encode = (CHAR c) CHAR:
BEGIN
# We assume the alphabet is contiguous. #
"-123-12*-22455-12623-1*2-2"[ABS to lower(c) - ABS "a" + 1]
END;
INT soundex code length = 4;
STRING result := soundex code length ... |
http://rosettacode.org/wiki/Sorting_algorithms/Shell_sort | Sorting algorithms/Shell sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #ARM_Assembly | ARM Assembly |
/* ARM assembly Raspberry PI */
/* program shellSort.s */
/************************************/
/* Constantes */
/************************************/
.equ STDOUT, 1 @ Linux output console
.equ EXIT, 1 @ Linux syscall
.equ WRITE, 4 @ Linux syscall
/************************... |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #Haskell | Haskell | import Data.List.Split (splitOneOf)
import Data.Char (chr)
toSparkLine :: [Double] -> String
toSparkLine xs = map cl xs
where
top = maximum xs
bot = minimum xs
range = top - bot
cl x = chr $ 0x2581 + floor (min 7 ((x - bot) / range * 8))
makeSparkLine :: String -> (String, Stats)
makeSparkLine x... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #MAXScript | MAXScript | fn strandSort arr =
(
arr = deepcopy arr
local sub = #()
local results = #()
while arr.count > 0 do
(
sub = #()
append sub (amax arr)
deleteitem arr (for i in 1 to arr.count where arr[i] == amax arr collect i)[1]
local i = 1
while i <= arr.count do
(
if arr[i] > sub[sub.count] do
(
append sub... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #NetRexx | NetRexx | /* NetRexx */
options replace format comments java crossref savelog symbols binary
import java.util.List
placesList = [String -
"UK London", "US New York", "US Boston", "US Washington" -
, "UK Washington", "US Birmingham", "UK Birmingham", "UK Boston" -
]
lists = [ -
placesList -
... |
http://rosettacode.org/wiki/Stable_marriage_problem | Stable marriage problem | Solve the Stable marriage problem using the Gale/Shapley algorithm.
Problem description
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each woman ranks all the men in order of her preference.
A stable set of engagements for marriage is o... | #Kotlin | Kotlin |
data class Person(val name: String) {
val preferences = mutableListOf<Person>()
var matchedTo: Person? = null
fun trySwap(p: Person) {
if (prefers(p)) {
matchedTo?.matchedTo = null
matchedTo = p
p.matchedTo = this
}
}
fun prefers(p: Person) =... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #XPL0 | XPL0 | int C, N, N2, T;
[C:= 0; N:= 1;
loop [N2:= N*N;
IntOut(0, N2);
T:= fix(Pow(float(N2), 1./3.));
if T*T*T # N2 then
[ChOut(0, ^ );
C:= C+1;
if C >= 30 then quit;
]
else Text(0, "* ");
N:= N+1;
];
Text(0... |
http://rosettacode.org/wiki/Square_but_not_cube | Square but not cube | Task
Show the first 30 positive integers which are squares but not cubes of such integers.
Optionally, show also the first 3 positive integers which are both squares and cubes, and mark them as such.
| #zkl | zkl | println("First 30 positive integers that are a square but not a cube:");
squareButNotCube:=(1).walker(*).tweak(fcn(n){
sq,cr := n*n, sq.toFloat().pow(1.0/3).round(); // cube root(64)<4
if(sq==cr*cr*cr) Void.Skip else sq
});
squareButNotCube.walk(30).concat(",").println("\n");
println("First 15 positive integer... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Swift | Swift | public extension String {
func splitOnChanges() -> [String] {
guard !isEmpty else {
return []
}
var res = [String]()
var workingChar = first!
var workingStr = "\(workingChar)"
for char in dropFirst() {
if char != workingChar {
res.append(workingStr)
workingStr =... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Tailspin | Tailspin |
composer splitEquals
<reps> <nextReps>*
rule reps: <'(.)\1*'>
rule nextReps: <reps> -> \(', ' ! $ ! \)
end splitEquals
'gHHH5YY++///\' -> splitEquals -> !OUT::write
|
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #Fortran | Fortran | module mod_stack
implicit none
type node
! data entry in each node
real*8, private :: data
! pointer to the next node of the linked list
type(node), pointer, private :: next
end type node
private node
type stack
! pointer to first element of stack.
type(node), pointer, private :: f... |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #Elixir | Elixir | defmodule RC do
def spiral_matrix(n) do
wide = length(to_char_list(n*n-1))
fmt = String.duplicate("~#{wide}w ", n) <> "~n"
runs = Enum.flat_map(n..1, &[&1,&1]) |> tl
delta = Stream.cycle([{0,1},{1,0},{0,-1},{-1,0}])
running(Enum.zip(runs,delta),0,-1,[])
|> Enum.with_index |> Enum.sort |> Enum... |
http://rosettacode.org/wiki/Special_variables | Special variables | Special variables have a predefined meaning within a computer programming language.
Task
List the special variables used within the language.
| #OCaml | OCaml | val argv : string array
(** The command line arguments given to the process.
The first element is the command name used to invoke the program.
The following elements are the command-line arguments
given to the program. *)
val executable_name : string
(** The name of the file containing the executable current... |
http://rosettacode.org/wiki/Sorting_algorithms/Permutation_sort | Sorting algorithms/Permutation sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #AArch64_Assembly | AArch64 Assembly |
/* ARM assembly AARCH64 Raspberry PI 3B */
/* program permutationSort64.s */
/*******************************************/
/* Constantes file */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeConsta... |
http://rosettacode.org/wiki/Sorting_algorithms/Permutation_sort | Sorting algorithms/Permutation sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #ActionScript | ActionScript | //recursively builds the permutations of permutable, appended to front, and returns the first sorted permutation it encounters
function permutations(front:Array, permutable:Array):Array {
//If permutable has length 1, there is only one possible permutation. Check whether it's sorted
if (permutable.length==1)
return... |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #HicEst | HicEst | \b backspace
\d delete
\e escape
\f formfeed
\l linefeed
\n newline
\r return
\t horizontal tab
\v vertical tab
\' single quote
\" double quote
\\ backslash
\ddd octal code
\xdd hexadecimal code
\^c control code |
http://rosettacode.org/wiki/Special_characters | Special characters | Special characters are symbols (single characters or sequences of characters) that have a "special" built-in meaning in the language and typically cannot be used in identifiers.
Escape sequences are methods that the language uses to remove the special meaning from the symbol, enabling it to be used as a normal charact... | #HTML | HTML | \b backspace
\d delete
\e escape
\f formfeed
\l linefeed
\n newline
\r return
\t horizontal tab
\v vertical tab
\' single quote
\" double quote
\\ backslash
\ddd octal code
\xdd hexadecimal code
\^c control code |
http://rosettacode.org/wiki/Sorting_algorithms/Stooge_sort | Sorting algorithms/Stooge sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #C.23 | C# | public static void Sort<T>(List<T> list) where T : IComparable {
if (list.Count > 1) {
StoogeSort(list, 0, list.Count - 1);
}
}
private static void StoogeSort<T>(List<T> L, int i, int j) where T : IComparable {
if (L[j].CompareTo(L[i])<0) {
T tmp = L[i];
... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #CoffeeScript | CoffeeScript |
after = (s, f) -> setTimeout f, s*1000
# Setting Computer Science back at least a century, maybe more,
# this algorithm sorts integers using a highly parallelized algorithm.
sleep_sort = (arr) ->
for n in arr
do (n) -> after n, -> console.log n
do ->
input = (parseInt(arg) for arg in process.argv[2...])
... |
http://rosettacode.org/wiki/Sorting_algorithms/Sleep_sort | Sorting algorithms/Sleep sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Common_Lisp | Common Lisp | (defun sleeprint(n)
(sleep (/ n 10))
(format t "~a~%" n))
(loop for arg in (cdr sb-ext:*posix-argv*) doing
(sb-thread:make-thread (lambda() (sleeprint (parse-integer arg)))))
(loop while (not (null (cdr (sb-thread:list-all-threads))))) |
http://rosettacode.org/wiki/Sorting_algorithms/Selection_sort | Sorting algorithms/Selection sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #AArch64_Assembly | AArch64 Assembly |
/* ARM assembly AARCH64 Raspberry PI 3B */
/* program selectionSort64.s */
/*******************************************/
/* Constantes file */
/*******************************************/
/* for this file see task include a file in language AArch64 assembly */
.include "../includeConstan... |
http://rosettacode.org/wiki/Soundex | Soundex | Soundex is an algorithm for creating indices for words based on their pronunciation.
Task
The goal is for homophones to be encoded to the same representation so that they can be matched despite minor differences in spelling (from the soundex Wikipedia article).
Caution
There is a major issue in many of the ... | #ANSI_Standard_BASIC | ANSI Standard BASIC | 100 DECLARE EXTERNAL FUNCTION FNSoundex$
110
120 DATA Ashcraft, Ashcroft, Gauss, Ghosh, Hilbert, Heilbronn, Lee, Lloyd
130 DATA Moses, Pfister, Robert, Rupert, Rubin, Tymczak, Soundex, Example
140 FOR i = 1 TO 16
150 READ name$
160 PRINT """"; name$; """"; TAB(15); FNsoundex$(name$)
170 NEXT i
180 END
190
200 E... |
http://rosettacode.org/wiki/Sorting_algorithms/Shell_sort | Sorting algorithms/Shell sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Arturo | Arturo | shellSort: function [items][
a: new items
h: size a
while [h > 0][
h: h / 2
loop h..dec size a 'i [
k: a\[i]
j: i
while [and? [j >= h] [k < a\[j-h]]][
a\[j]: a\[j-h]
j: j - h
]
a\[j]: k
]
... |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #J | J | spkln =: verb define
y spkln~ 4 u:16b2581+i.8 NB. ▁▂▃▄▅▆▇█
:
'MIN MAX' =. (<./ , >./) y
N =. # x
x {~ <. (N-1) * (y-MIN) % MAX-MIN
) |
http://rosettacode.org/wiki/Sparkline_in_unicode | Sparkline in unicode | A sparkline is a graph of successive values laid out horizontally
where the height of the line is proportional to the values in succession.
Task
Use the following series of Unicode characters to create a program
that takes a series of numbers separated by one or more whitespace or comma characters
and generates a s... | #Java | Java |
public class Sparkline
{
String bars="▁▂▃▄▅▆▇█";
public static void main(String[] args)
{
Sparkline now=new Sparkline();
float[] arr={1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1};
now.display1D(arr);
System.out.println(now.getSparkline(arr));
float[] arr1={1.5f, 0.5f, 3.5f, 2.5f, 5.5f, 4.5f, 7.5f, 6.5f}... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #Nim | Nim | proc mergeList[T](a, b: var seq[T]): seq[T] =
result = @[]
while a.len > 0 and b.len > 0:
if a[0] < b[0]:
result.add a[0]
a.delete 0
else:
result.add b[0]
b.delete 0
result.add a
result.add b
proc strand[T](a: var seq[T]): seq[T] =
var i = 0
result = @[a[0]]
a.delete 0
... |
http://rosettacode.org/wiki/Sorting_algorithms/Strand_sort | Sorting algorithms/Strand sort |
Sorting Algorithm
This is a sorting algorithm. It may be applied to a set of data in order to sort it.
For comparing various sorts, see compare sorts.
For other sorting algorithms, see sorting algorithms, or:
O(n logn) sorts
Heap sort |
Merge sort |
Patience sort |
Quick sort
O(n log2n) sorts
Shell Sort
... | #OCaml | OCaml | let rec strand_sort (cmp : 'a -> 'a -> int) : 'a list -> 'a list = function
[] -> []
| x::xs ->
let rec extract_strand x = function
[] -> [x], []
| x1::xs when cmp x x1 <= 0 ->
let strand, rest = extract_strand x1 xs in x::strand, rest
| x1::xs ->
let strand, rest = extract_strand x ... |
http://rosettacode.org/wiki/Stable_marriage_problem | Stable marriage problem | Solve the Stable marriage problem using the Gale/Shapley algorithm.
Problem description
Given an equal number of men and women to be paired for marriage, each man ranks all the women in order of his preference and each woman ranks all the men in order of her preference.
A stable set of engagements for marriage is o... | #Lua | Lua | local Person = {}
Person.__index = Person
function Person.new(inName)
local o = {
name = inName,
prefs = nil,
fiance = nil,
_candidateIndex = 1,
}
return setmetatable(o, Person)
end
function Person:indexOf(other)
for i, p in pairs(self.pr... |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #tbas | tbas | SUB SPLITUNIQUE$(s$)
DIM c$, d$, split$, i%
c$ = LEFT$(s$, 1)
split$ = ""
FOR i% = 1 TO LEN(s$)
d$ = MID$(s$, i%, 1)
IF d$ <> c$ THEN
split$ = split$ + ", "
c$ = d$
END IF
split$ = split$ + d$
NEXT
RETURN split$
END SUB
PRINT SPLITUNIQUE$("gHHH5YY++///\")
END |
http://rosettacode.org/wiki/Split_a_character_string_based_on_change_of_character | Split a character string based on change of character |
Task
Split a (character) string into comma (plus a blank) delimited
strings based on a change of character (left to right).
Show the output here (use the 1st example below).
Blanks should be treated as any other character (except
they are problematic to display clearly). The same applies
to commas.
Fo... | #Tcl | Tcl | set string "gHHH5YY++///\\"
regsub -all {(.)\1*} $string {\0, } string
regsub {, $} $string {} string
puts $string |
http://rosettacode.org/wiki/Stack | Stack |
Data Structure
This illustrates a data structure, a means of storing data within a program.
You may see other such structures in the Data Structures category.
A stack is a container of elements with last in, first out access policy. Sometimes it also called LIFO.
The stack is accessed through its top.
The ba... | #Free_Pascal | Free Pascal | program Stack;
{$IFDEF FPC}{$MODE DELPHI}{$IFDEF WINDOWS}{$APPTYPE CONSOLE}{$ENDIF}{$ENDIF}
{$ASSERTIONS ON}
uses Generics.Collections;
var
lStack: TStack<Integer>;
begin
lStack := TStack<Integer>.Create;
try
lStack.Push(1);
lStack.Push(2);
lStack.Push(3);
Assert(lStack.Peek = 3); // 3 shoul... |
http://rosettacode.org/wiki/Spiral_matrix | Spiral matrix | Task
Produce a spiral array.
A spiral array is a square arrangement of the first N2 natural numbers, where the
numbers increase sequentially as you go around the edges of the array spiraling inwards.
For example, given 5, produce this array:
0 1 2 3 4
15 16 17 18 5
14 23 24 19 6
13 22 21 ... | #Euphoria | Euphoria | function spiral(integer dimension)
integer side, curr, curr2
sequence s
s = repeat(repeat(0,dimension),dimension)
side = dimension
curr = 0
for i = 0 to floor(dimension/2) do
for j = 1 to side-1 do
s[i+1][i+j] = curr -- top
curr2 = curr + side-1
s[i+j]... |
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