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/Sum_and_product_of_an_array | Sum and product of an array | Task
Compute the sum and product of an array of integers.
| #IDL | IDL | array = [3,6,8]
print,total(array)
print,product(array) |
http://rosettacode.org/wiki/Sum_of_a_series | Sum of a series | Compute the nth term of a series, i.e. the sum of the n first terms of the corresponding sequence.
Informally this value, or its limit when n tends to infinity, is also called the sum of the series, thus the title of this task.
For this task, use:
S
n
=
∑
k
=
1
n
1
k
2
{\displa... | #Fish | Fish | 0&aaa**>::*1$,&v
;n&^?:-1&+ < |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #Inform_7 | Inform 7 | Home is a room.
When play begins:
strip comments from "apples, pears # and bananas";
strip comments from "apples, pears ; and bananas";
end the story.
To strip comments from (T - indexed text):
say "[T] -> ";
replace the regular expression "<#;>.*$" in T with "";
say "[T][line break]". |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #J | J | strip=: dltb@(#~ *./\@:-.@e.&';#') |
http://rosettacode.org/wiki/Strip_block_comments | Strip block comments | A block comment begins with a beginning delimiter and ends with a ending delimiter, including the delimiters. These delimiters are often multi-character sequences.
Task
Strip block comments from program text (of a programming language much like classic C).
Your demos should at least handle simple, non-ne... | #Lua | Lua | filename = "Text1.txt"
fp = io.open( filename, "r" )
str = fp:read( "*all" )
fp:close()
stripped = string.gsub( str, "/%*.-%*/", "" )
print( stripped ) |
http://rosettacode.org/wiki/Strip_block_comments | Strip block comments | A block comment begins with a beginning delimiter and ends with a ending delimiter, including the delimiters. These delimiters are often multi-character sequences.
Task
Strip block comments from program text (of a programming language much like classic C).
Your demos should at least handle simple, non-ne... | #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | StringReplace[a,"/*"~~Shortest[___]~~"*/" -> ""]
->
function subroutine() {
a = b + c ;
}
function something() {
} |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #C.2B.2B | C++ | #include <string>
#include <iostream>
int main( ) {
std::string original( "Mary had a X lamb." ) , toBeReplaced( "X" ) ,
replacement ( "little" ) ;
std::string newString = original.replace( original.find( "X" ) ,
toBeReplaced.length( ) , replacement ) ;
std::cout << "String after replacement: " << ne... |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Clojure | Clojure | (let [little "little"]
(println (format "Mary had a %s lamb." little))) |
http://rosettacode.org/wiki/Sum_to_100 | Sum to 100 | Task
Find solutions to the sum to one hundred puzzle.
Add (insert) the mathematical
operators + or - (plus
or minus) before any of the digits in the
decimal numeric string 123456789 such that the
resulting mathematical expression adds up to a
particular sum (in this iconic case, ... | #Tcl | Tcl | proc sum_to_100 {} {
for {set i 0} {$i <= 13121} {incr i} {
set i3 [format %09d [dec2base 3 $i]]
set form ""
set subs {"" - +}
foreach a [split $i3 ""] b [split 123456789 ""] {
append form [lindex $subs $a] $b
}
lappend R([expr $form]) $form
}
puts "solutions for sum=100:\n[join [lsort $R(100)] \... |
http://rosettacode.org/wiki/Strip_a_set_of_characters_from_a_string | Strip a set of characters from a string | Task
Create a function that strips a set of characters from a string.
The function should take two arguments:
a string to be stripped
a string containing the set of characters to be stripped
The returned string should contain the first string, stripped of any characters in the second argument:
print str... | #ColdFusion | ColdFusion |
<Cfset theString = 'She was a soul stripper. She took my heart!'>
<Cfset theStrip = 'aei'>
<Cfloop from="1" to="#len(theStrip)#" index="i">
<cfset theString = replace(theString, Mid(theStrip, i, 1), '', 'all')>
</Cfloop>
<Cfoutput>#theString#</Cfoutput>
|
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Icon_and_Unicon | Icon and Unicon | s := "world!"
s := "Hello, " || s |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #J | J | s=: 'value'
s
value
s=: 'new ',s
s
new value |
http://rosettacode.org/wiki/String_comparison | String comparison |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #BBC_BASIC | BBC BASIC | REM >strcomp
shav$ = "Shaw, George Bernard"
shakes$ = "Shakespeare, William"
:
REM test equality
IF shav$ = shakes$ THEN PRINT "The two strings are equal" ELSE PRINT "The two strings are not equal"
:
REM test inequality
IF shav$ <> shakes$ THEN PRINT "The two strings are unequal" ELSE PRINT "The two strings are not une... |
http://rosettacode.org/wiki/String_case | String case | Task
Take the string alphaBETA and demonstrate how to convert it to:
upper-case and
lower-case
Use the default encoding of a string literal or plain ASCII if there is no string literal in your language.
Note: In some languages alphabets toLower and toUpper is not reversable.
Show any additional... | #AutoIt | AutoIt | $sString = "alphaBETA"
$sUppercase = StringUpper($sString) ;"ALPHABETA"
$sLowercase = StringLower($sString) ;"alphabeta" |
http://rosettacode.org/wiki/String_matching | String matching |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #BBC_BASIC | BBC BASIC | first$ = "The fox jumps over the dog"
FOR test% = 1 TO 3
READ second$
starts% = FN_first_starts_with_second(first$, second$)
IF starts% PRINT """" first$ """ starts with """ second$ """"
ends% = FN_first_ends_with_second(first$, second$)
IF ends% PRINT """" first$ "... |
http://rosettacode.org/wiki/String_length | String length | Task
Find the character and byte length of a string.
This means encodings like UTF-8 need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters.
By character, we mean an individual Unicode code point, not a user-visible grapheme containing combining characters.
F... | #Avail | Avail | |"møøse"| |
http://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string | Strip control codes and extended characters from a string | Task
Strip control codes and extended characters from a string.
The solution should demonstrate how to achieve each of the following results:
a string with control codes stripped (but extended characters not stripped)
a string with control codes and extended characters stripped
In ASCII, the control codes ... | #Icon_and_Unicon | Icon and Unicon | procedure main(A)
write(image(deletec(&ascii,&ascii--(&ascii)[33:127])))
end
link strings
|
http://rosettacode.org/wiki/String_concatenation | String concatenation | String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
Task
Create a string variable equal to any text value.
Create another string variable whose value is the original variable concatenated with another string literal.
To illustrate the operat... | #ChucK | ChucK |
"Hello" => string A;
A + " World!" => string B;
<<< B >>>;
|
http://rosettacode.org/wiki/String_concatenation | String concatenation | String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
Task
Create a string variable equal to any text value.
Create another string variable whose value is the original variable concatenated with another string literal.
To illustrate the operat... | #Clojure | Clojure | (def a-str "abcd")
(println (str a-str "efgh"))
(def a-new-str (str a-str "efgh"))
(println a-new-str) |
http://rosettacode.org/wiki/Sum_multiples_of_3_and_5 | Sum multiples of 3 and 5 | Task
The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below n.
Show output for n = 1000.
This is is the same as Project Euler problem 1.
Extra credit: do this efficiently for n = 1e20 or higher.
| #Kotlin | Kotlin | // version 1.1.2
import java.math.BigInteger
val big2 = BigInteger.valueOf(2)
val big3 = BigInteger.valueOf(3)
val big5 = BigInteger.valueOf(5)
val big15 = big3 * big5
fun sum35(n: Int) = (3 until n).filter { it % 3 == 0 || it % 5 == 0}.sum()
fun sum35(n: BigInteger): BigInteger {
val nn = n - BigInte... |
http://rosettacode.org/wiki/Sum_digits_of_an_integer | Sum digits of an integer | Task
Take a Natural Number in a given base and return the sum of its digits:
110 sums to 1
123410 sums to 10
fe16 sums to 29
f0e16 sums to 29
| #Lasso | Lasso | define br => '<br />\n'
define sumdigits(int, base = 10) => {
fail_if(#base < 2, -1, 'Base need to be at least 2')
local(
out = integer,
divmod
)
while(#int) => {
#divmod = #int -> div(#base)
#int = #divmod -> first
#out += #divmod -> second
}
return #out
}
sumdigits(1)
br
sumdigits(12345)
br
su... |
http://rosettacode.org/wiki/Sum_of_squares | Sum of squares | Task
Write a program to find the sum of squares of a numeric vector.
The program should work on a zero-length vector (with an answer of 0).
Related task
Mean
| #M2000_Interpreter | M2000 Interpreter |
Dim A() 'make an array with zero items
A=(,) 'make a pointer to array with zero items
A=(1,) 'make a pointer to array with one item
A()=A 'make a copy of array pointed by A to A()
A=A() 'make A a pointer for A()
Dim A(10)=1 'redim A() and pass 1 to each item
k=lambda m=1->{=m:m++} ' a lambda function wit... |
http://rosettacode.org/wiki/Strip_whitespace_from_a_string/Top_and_tail | Strip whitespace from a string/Top and tail | Task
Demonstrate how to strip leading and trailing whitespace from a string.
The solution should demonstrate how to achieve the following three results:
String with leading whitespace removed
String with trailing whitespace removed
String with both leading and trailing whitespace removed
For the purposes of thi... | #FreeBASIC | FreeBASIC | ' FB 1.05.0 Win64
Const whitespace = !" \t\n\v\f\r"
Dim s As String = !" \tRosetta Code \v\f\r\n"
Dim s1 As String = LTrim (s, Any whitespace)
Dim s2 As String = RTrim (s, Any whitespace)
Dim s3 As String = Trim (s, Any whitespace)
' Under Windows console :
' "vertical tab" displays as ♂
' "form feed" display... |
http://rosettacode.org/wiki/Strong_and_weak_primes | Strong and weak primes |
Definitions (as per number theory)
The prime(p) is the pth prime.
prime(1) is 2
prime(4) is 7
A strong prime is when prime(p) is > [prime(p-1) + prime(p+1)] ÷ 2
A weak prime is when prime(p) is < [prime(p-1) + prime(p+1)] ÷ 2
Note that the defin... | #Scala | Scala | object StrongWeakPrimes {
def main(args: Array[String]): Unit = {
val bnd = 1000000
println(
f"""|First 36 Strong Primes: ${strongPrimes.take(36).map(n => f"$n%,d").mkString(", ")}
|Strong Primes < 1,000,000: ${strongPrimes.takeWhile(_ < bnd).size}%,d
|Strong Primes < 10,000,000: ${s... |
http://rosettacode.org/wiki/Substring | Substring |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #D | D | import std.stdio, std.string;
void main() {
const s = "the quick brown fox jumps over the lazy dog";
enum n = 5, m = 3;
writeln(s[n .. n + m]);
writeln(s[n .. $]);
writeln(s[0 .. $ - 1]);
const i = s.indexOf("q");
writeln(s[i .. i + m]);
const j = s.indexOf("qu");
writeln... |
http://rosettacode.org/wiki/Sudoku | Sudoku | Task
Solve a partially filled-in normal 9x9 Sudoku grid and display the result in a human-readable format.
references
Algorithmics of Sudoku may help implement this.
Python Sudoku Solver Computerphile video.
| #Fortran | Fortran | program sudoku
implicit none
integer, dimension (9, 9) :: grid
integer, dimension (9, 9) :: grid_solved
grid = reshape ((/ &
& 0, 0, 3, 0, 2, 0, 6, 0, 0, &
& 9, 0, 0, 3, 0, 5, 0, 0, 1, &
& 0, 0, 1, 8, 0, 6, 4, 0, 0, &
& 0, 0, 8, 1, 0, 2, 9, 0, 0, &
& 7, 0, 0, 0, 0, 0,... |
http://rosettacode.org/wiki/Subleq | Subleq | Subleq is an example of a One-Instruction Set Computer (OISC).
It is named after its only instruction, which is SUbtract and Branch if Less than or EQual to zero.
Task
Your task is to create an interpreter which emulates a SUBLEQ machine.
The machine's memory consists of an array of signed integers. These integers... | #jq | jq | # If your jq has while/2 then the following definition can be omitted:
def while(cond; update):
def _while: if cond then ., (update | _while) else empty end;
_while;
# subleq(a) runs the program, a, an array of integers.
# Input: the data
# When the subleq OSIC is about to emit a NUL character, it stops instead.
... |
http://rosettacode.org/wiki/Subleq | Subleq | Subleq is an example of a One-Instruction Set Computer (OISC).
It is named after its only instruction, which is SUbtract and Branch if Less than or EQual to zero.
Task
Your task is to create an interpreter which emulates a SUBLEQ machine.
The machine's memory consists of an array of signed integers. These integers... | #Julia | Julia | module Subleq
using OffsetArrays
function interpret(allwords::AbstractVector{Int})
words = OffsetArray(allwords, -1)
buf = IOBuffer()
ip = 0
while true
a, b, c = words[ip:ip+2]
ip += 3
if a < 0
print("Enter a character: ")
words[b] = parse(Int, readli... |
http://rosettacode.org/wiki/Successive_prime_differences | Successive prime differences | The series of increasing prime numbers begins: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ...
The task applies a filter to the series returning groups of successive primes, (s'primes), that differ from the next by a given value or values.
Example 1: Specifying that the difference between s'primes be 2 leads to the groups:
... | #Ring | Ring |
load "stdlib.ring"
see "working..." + nl + nl
see "For primes less than 1,000,000:" + nl + nl
num = 0
limit = 1000000
Primes = []
SuccPrimes = []
Sp = [[2],[1],[2,2],[2,4],[4,2],[6,4,2]]
for n = 1 to limit
if isprime(n)
add(Primes,n)
ok
next
for n = 1 to len(Sp)
num = 0
for m = 1 to len(Pri... |
http://rosettacode.org/wiki/Substring/Top_and_tail | Substring/Top and tail | The task is to demonstrate how to remove the first and last characters from a string.
The solution should demonstrate how to obtain the following results:
String with first character removed
String with last character removed
String with both the first and last characters removed
If the program uses UTF-8 or UTF... | #Groovy | Groovy | def top = { it.size() > 1 ? it[0..-2] : '' }
def tail = { it.size() > 1 ? it[1..-1] : '' } |
http://rosettacode.org/wiki/Subtractive_generator | Subtractive generator | A subtractive generator calculates a sequence of random numbers, where each number is congruent to the subtraction of two previous numbers from the sequence.
The formula is
r
n
=
r
(
n
−
i
)
−
r
(
n
−
j
)
(
mod
m
)
{\displaystyle r_{n}=r_{(n-i)}-r_{(n-j)}{\pmod {m}}}
for some fixed values of... | #Raku | Raku | sub bentley-clever($seed) {
constant $mod = 1_000_000_000;
my @seeds = ($seed % $mod, 1, (* - *) % $mod ... *)[^55];
my @state = @seeds[ 34, (* + 34 ) % 55 ... 0 ];
sub subrand() {
push @state, (my $x = (@state.shift - @state[*-24]) % $mod);
$x;
}
subrand for 55 .. 219;
... |
http://rosettacode.org/wiki/Sum_and_product_of_an_array | Sum and product of an array | Task
Compute the sum and product of an array of integers.
| #Inform_7 | Inform 7 | Sum And Product is a room.
To decide which number is the sum of (N - number) and (M - number) (this is summing):
decide on N + M.
To decide which number is the product of (N - number) and (M - number) (this is production):
decide on N * M.
When play begins:
let L be {1, 2, 3, 4, 5};
say "List: [L in brace not... |
http://rosettacode.org/wiki/Sum_of_a_series | Sum of a series | Compute the nth term of a series, i.e. the sum of the n first terms of the corresponding sequence.
Informally this value, or its limit when n tends to infinity, is also called the sum of the series, thus the title of this task.
For this task, use:
S
n
=
∑
k
=
1
n
1
k
2
{\displa... | #Forth | Forth | : sum ( fn start count -- fsum )
0e
bounds do
i s>d d>f dup execute f+
loop drop ;
:noname ( x -- 1/x^2 ) fdup f* 1/f ; ( xt )
1 1000 sum f. \ 1.64393456668156
pi pi f* 6e f/ f. \ 1.64493406684823 |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #Java | Java | import java.io.*;
public class StripLineComments{
public static void main( String[] args ){
if( args.length < 1 ){
System.out.println("Usage: java StripLineComments StringToProcess");
}
else{
String inputFile = args[0];
String input = "";
try{
BufferedReader reader = new BufferedReader( n... |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #JavaScript | JavaScript | function stripComments(s) {
var re1 = /^\s+|\s+$/g; // Strip leading and trailing spaces
var re2 = /\s*[#;].+$/g; // Strip everything after # or ; to the end of the line, including preceding spaces
return s.replace(re1,'').replace(re2,'');
}
var s1 = 'apples, pears # and bananas';
var s2 = 'apples, pears ; a... |
http://rosettacode.org/wiki/Strip_block_comments | Strip block comments | A block comment begins with a beginning delimiter and ends with a ending delimiter, including the delimiters. These delimiters are often multi-character sequences.
Task
Strip block comments from program text (of a programming language much like classic C).
Your demos should at least handle simple, non-ne... | #MATLAB_.2F_Octave | MATLAB / Octave | function str = stripblockcomment(str,startmarker,endmarker)
while(1)
ix1 = strfind(str, startmarker);
if isempty(ix1) return; end;
ix2 = strfind(str(ix1+length(startmarker):end),endmarker);
if isempty(ix2)
str = str(1:ix1(1)-1);
return;
else
str = [str(1:ix... |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #COBOL | COBOL | IDENTIFICATION DIVISION.
PROGRAM-ID. interpolation-included.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 extra PIC X(6) VALUE "little".
PROCEDURE DIVISION.
DISPLAY FUNCTION SUBSTITUTE("Mary had a X lamb.", "X", extra)
GOBACK
. |
http://rosettacode.org/wiki/Sum_to_100 | Sum to 100 | Task
Find solutions to the sum to one hundred puzzle.
Add (insert) the mathematical
operators + or - (plus
or minus) before any of the digits in the
decimal numeric string 123456789 such that the
resulting mathematical expression adds up to a
particular sum (in this iconic case, ... | #Visual_Basic_.NET | Visual Basic .NET | ' Recursively iterates (increments) iteration array, returns -1 when out of "digits".
Function plusOne(iAry() As Integer, spot As Integer) As Integer
Dim spotLim As Integer = If(spot = 0, 1, 2) ' The first "digit" has a lower limit.
If iAry(spot) = spotLim Then ' Check if spot has reached limit
If spot ... |
http://rosettacode.org/wiki/Strip_a_set_of_characters_from_a_string | Strip a set of characters from a string | Task
Create a function that strips a set of characters from a string.
The function should take two arguments:
a string to be stripped
a string containing the set of characters to be stripped
The returned string should contain the first string, stripped of any characters in the second argument:
print str... | #Common_Lisp | Common Lisp | (defun strip-chars (str chars)
(remove-if (lambda (ch) (find ch chars)) str))
(strip-chars "She was a soul stripper. She took my heart!" "aei")
;; => "Sh ws soul strppr. Sh took my hrt!"
;; strip whitespace:
(string-trim
'(#\Space #\Newline #\Backspace #\Tab
#\Linefeed #\Page #\Return #\Rubout)
... |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Java | Java | // prepend
public class Prepend {
public static void main(String[] args) {
StringBuilder sb = new StringBuilder("world");
sb.insert(0, "Hello, ");
System.out.println(sb);
}
} |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #JavaScript | JavaScript | // No built-in prepend
var s=", World"
s = "Hello" + s
print(s); |
http://rosettacode.org/wiki/String_comparison | String comparison |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Bracmat | Bracmat | ( {Comparing two strings for exact equality}
& ( ( @(abc:abc)
& @(123:%123)
{Previous pairs of strings are exactly equal}
)
& ( @(abc:Abc)
| @(123:%246/2)
| @(abc:ab)
| @(123:%12)
| {Previous pairs of strings are not exactly equal}
)
)
{Comparing two strings for inequality (i.e., t... |
http://rosettacode.org/wiki/String_case | String case | Task
Take the string alphaBETA and demonstrate how to convert it to:
upper-case and
lower-case
Use the default encoding of a string literal or plain ASCII if there is no string literal in your language.
Note: In some languages alphabets toLower and toUpper is not reversable.
Show any additional... | #Avail | Avail | Print: uppercase "alphaBETA";
Print: lowercase "alphaBETA"; |
http://rosettacode.org/wiki/String_case | String case | Task
Take the string alphaBETA and demonstrate how to convert it to:
upper-case and
lower-case
Use the default encoding of a string literal or plain ASCII if there is no string literal in your language.
Note: In some languages alphabets toLower and toUpper is not reversable.
Show any additional... | #AWK | AWK | BEGIN {
a = "alphaBETA";
print toupper(a), tolower(a)
} |
http://rosettacode.org/wiki/String_matching | String matching |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #BQN | BQN | SW ← ⊑⍷˜
Contains ← ∨´⍷˜
EW ← ¯1⊑⍷˜
Locs ← /⍷˜ |
http://rosettacode.org/wiki/String_length | String length | Task
Find the character and byte length of a string.
This means encodings like UTF-8 need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters.
By character, we mean an individual Unicode code point, not a user-visible grapheme containing combining characters.
F... | #AWK | AWK | w=length("Hello, world!") # static string example
x=length("Hello," s " world!") # dynamic string example
y=length($1) # input field example
z=length(s) # variable name example |
http://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string | Strip control codes and extended characters from a string | Task
Strip control codes and extended characters from a string.
The solution should demonstrate how to achieve each of the following results:
a string with control codes stripped (but extended characters not stripped)
a string with control codes and extended characters stripped
In ASCII, the control codes ... | #J | J | stripControlCodes=: -.&(DEL,32{.a.)
stripControlExtCodes=: ([ -. -.)&(32}.127{.a.) |
http://rosettacode.org/wiki/String_concatenation | String concatenation | String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
Task
Create a string variable equal to any text value.
Create another string variable whose value is the original variable concatenated with another string literal.
To illustrate the operat... | #COBOL | COBOL | IDENTIFICATION DIVISION.
PROGRAM-ID. Concat.
DATA DIVISION.
WORKING-STORAGE SECTION.
01 Str PIC X(7) VALUE "Hello, ".
01 Str2 PIC X(15).
PROCEDURE DIVISION.
DISPLAY "Str : " Str
STRING Str " World!" DELIMITED BY SIZE INTO Str2
DIS... |
http://rosettacode.org/wiki/Sum_multiples_of_3_and_5 | Sum multiples of 3 and 5 | Task
The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below n.
Show output for n = 1000.
This is is the same as Project Euler problem 1.
Extra credit: do this efficiently for n = 1e20 or higher.
| #Lasso | Lasso | local(limit = 1)
while(#limit <= 100000) => {^
local(s = 0)
loop(-from=3,-to=#limit-1) => {
not (loop_count % 3) || not (loop_count % 5) ? #s += loop_count
}
'The sum of multiples of 3 or 5 between 1 and '+(#limit-1)+' is: '+#s+'\r'
#limit = integer(#limit->asString + '0')
^} |
http://rosettacode.org/wiki/Sum_digits_of_an_integer | Sum digits of an integer | Task
Take a Natural Number in a given base and return the sum of its digits:
110 sums to 1
123410 sums to 10
fe16 sums to 29
f0e16 sums to 29
| #Lingo | Lingo | on sum_digits (n, base)
sum = 0
repeat while n
m = n / base
sum = sum + n - m * base
n = m
end repeat
return sum
end |
http://rosettacode.org/wiki/Sum_of_squares | Sum of squares | Task
Write a program to find the sum of squares of a numeric vector.
The program should work on a zero-length vector (with an answer of 0).
Related task
Mean
| #Maple | Maple |
F := V -> add(v^2, v in V):
F(<1,2,3,4,5>);
|
http://rosettacode.org/wiki/Strip_whitespace_from_a_string/Top_and_tail | Strip whitespace from a string/Top and tail | Task
Demonstrate how to strip leading and trailing whitespace from a string.
The solution should demonstrate how to achieve the following three results:
String with leading whitespace removed
String with trailing whitespace removed
String with both leading and trailing whitespace removed
For the purposes of thi... | #FutureBasic | FutureBasic | window 1
CFCharacterSetRef set, invSet
CFStringRef s, s1, s2, s3
NSUInteger index
CFRange range
set = fn CharacterSetWhitespaceAndNewlineSet
invSet = fn CharacterSetInvertedSet( set )
text ,,,,, 200
s = @" a string "// 5 leading spaces, 8 trailing spaces
print s, len(s)@" chars... |
http://rosettacode.org/wiki/Strong_and_weak_primes | Strong and weak primes |
Definitions (as per number theory)
The prime(p) is the pth prime.
prime(1) is 2
prime(4) is 7
A strong prime is when prime(p) is > [prime(p-1) + prime(p+1)] ÷ 2
A weak prime is when prime(p) is < [prime(p-1) + prime(p+1)] ÷ 2
Note that the defin... | #Sidef | Sidef | var primes = 10_000_019.primes
var (*strong, *weak, *balanced)
for k in (1 ..^ primes.end) {
var p = primes[k]
given((primes[k-1] + primes[k+1])/2) { |x|
case (x > p) { weak << p }
case (x < p) { strong << p }
else { balanced << p }
}
}
for pr, type, d, c1, c2 i... |
http://rosettacode.org/wiki/Substring | Substring |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #DBL | DBL | ;starting from n characters in and of m length;
SUB_STR = STR(n:m)
;starting from n characters in, up to the end of the string;
SUB_STR = STR(n,$LEN(STR))
;whole string minus last character;
SUB_STR = STR(1,%TRIM(STR)-1)
;starting from a known character f within the string and of m length;
;starting from a known ... |
http://rosettacode.org/wiki/Sudoku | Sudoku | Task
Solve a partially filled-in normal 9x9 Sudoku grid and display the result in a human-readable format.
references
Algorithmics of Sudoku may help implement this.
Python Sudoku Solver Computerphile video.
| #FreeBASIC | FreeBASIC | Dim Shared As Integer cuadricula(9, 9), cuadriculaResuelta(9, 9)
Function isSafe(i As Integer, j As Integer, n As Integer) As Boolean
Dim As Integer iMin, jMin, f, c
If cuadricula(i, j) <> 0 Then Return (cuadricula(i, j) = n)
'cuadricula(i, j) es una celda vacía. Compruebe si n está OK
'primero re... |
http://rosettacode.org/wiki/Subleq | Subleq | Subleq is an example of a One-Instruction Set Computer (OISC).
It is named after its only instruction, which is SUbtract and Branch if Less than or EQual to zero.
Task
Your task is to create an interpreter which emulates a SUBLEQ machine.
The machine's memory consists of an array of signed integers. These integers... | #Kotlin | Kotlin | // version 1.1.2
fun subleq(program: String) {
val words = program.split(' ').map { it.toInt() }.toTypedArray()
val sb = StringBuilder()
var ip = 0
while (true) {
val a = words[ip]
val b = words[ip + 1]
var c = words[ip + 2]
ip += 3
if (a < 0) {
prin... |
http://rosettacode.org/wiki/Successive_prime_differences | Successive prime differences | The series of increasing prime numbers begins: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ...
The task applies a filter to the series returning groups of successive primes, (s'primes), that differ from the next by a given value or values.
Example 1: Specifying that the difference between s'primes be 2 leads to the groups:
... | #Ruby | Ruby | require 'prime'
PRIMES = Prime.each(1_000_000).to_a
difs = [[2], [1], [2,2], [2,4], [4,2], [6,4,2]]
difs.each do |ar|
res = PRIMES.each_cons(ar.size+1).select do |slice|
slice.each_cons(2).zip(ar).all? {|(a,b), c| a+c == b}
end
puts "#{ar} has #{res.size} sets. #{res.first}...#{res.last}"
end
|
http://rosettacode.org/wiki/Substring/Top_and_tail | Substring/Top and tail | The task is to demonstrate how to remove the first and last characters from a string.
The solution should demonstrate how to obtain the following results:
String with first character removed
String with last character removed
String with both the first and last characters removed
If the program uses UTF-8 or UTF... | #GW-BASIC | GW-BASIC | 10 A$="knight":B$="socks":C$="brooms"
20 PRINT MID$(A$,2)
30 PRINT LEFT$(B$,LEN(B$)-1)
40 PRINT MID$(C$,2,LEN(C$)-2) |
http://rosettacode.org/wiki/Subtractive_generator | Subtractive generator | A subtractive generator calculates a sequence of random numbers, where each number is congruent to the subtraction of two previous numbers from the sequence.
The formula is
r
n
=
r
(
n
−
i
)
−
r
(
n
−
j
)
(
mod
m
)
{\displaystyle r_{n}=r_{(n-i)}-r_{(n-j)}{\pmod {m}}}
for some fixed values of... | #REXX | REXX | /*REXX program uses a subtractive generator, and creates a sequence of random numbers. */
s.0= 292929; s.1= 1; billion= 1e9
numeric digits 20
cI= 55; do i=2 for cI-2; s.i= mod( s(i-2) - s(i-1), billion)
end /*i*/
Cp= 34
... |
http://rosettacode.org/wiki/Sum_and_product_of_an_array | Sum and product of an array | Task
Compute the sum and product of an array of integers.
| #J | J | sum =: +/
product =: */ |
http://rosettacode.org/wiki/Sum_and_product_of_an_array | Sum and product of an array | Task
Compute the sum and product of an array of integers.
| #Java | Java | public class SumProd
{
public static void main(final String[] args)
{
int sum = 0;
int prod = 1;
int[] arg = {1,2,3,4,5};
for (int i : arg)
{
sum += i;
prod *= i;
}
}
} |
http://rosettacode.org/wiki/Sum_of_a_series | Sum of a series | Compute the nth term of a series, i.e. the sum of the n first terms of the corresponding sequence.
Informally this value, or its limit when n tends to infinity, is also called the sum of the series, thus the title of this task.
For this task, use:
S
n
=
∑
k
=
1
n
1
k
2
{\displa... | #Fortran | Fortran | real, dimension(1000) :: a = (/ (1.0/(i*i), i=1, 1000) /)
real :: result
result = sum(a); |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #jq | jq | sub("[#;].*";"") | sub("^\\s+";"") | sub("\\s+$";"") |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #Julia | Julia |
using Printf
function striplinecomment(a::String, cchars::String="#;")
b = strip(a)
0 < length(cchars) || return b
for c in cchars
r = Regex(@sprintf "\\%c.*" c)
b = replace(b, r => "")
end
strip(b)
end
tests = ("apples, pears # and bananas",
"apples, pears ; and banan... |
http://rosettacode.org/wiki/Strip_comments_from_a_string | Strip comments from a string | Strip comments from a string
You are encouraged to solve this task according to the task description, using any language you may know.
The task is to remove text that follow any of a set of comment markers, (in these examples either a hash or a semicolon) from a string or input line.
Whitespace debacle: There is s... | #Kotlin | Kotlin | // version 1.0.6
val r = Regex("""(/\*.*\*/|//.*$)""")
fun stripComments(s: String) = s.replace(r, "").trim()
fun main(args: Array<String>) {
val strings = arrayOf(
"apples, pears // and bananas",
" apples, pears /* and bananas */",
"/* oranges */ apples // pears and bananas ",
... |
http://rosettacode.org/wiki/Strip_block_comments | Strip block comments | A block comment begins with a beginning delimiter and ends with a ending delimiter, including the delimiters. These delimiters are often multi-character sequences.
Task
Strip block comments from program text (of a programming language much like classic C).
Your demos should at least handle simple, non-ne... | #Nim | Nim | import strutils
proc commentStripper(txt: string; delim: tuple[l, r: string] = ("/*", "*/")): string =
let i = txt.find(delim.l)
if i < 0: return txt
result = if i > 0: txt[0 ..< i] else: ""
let tmp = commentStripper(txt[i+delim.l.len .. txt.high], delim)
let j = tmp.find(delim.r)
assert j >= 0
result... |
http://rosettacode.org/wiki/Strip_block_comments | Strip block comments | A block comment begins with a beginning delimiter and ends with a ending delimiter, including the delimiters. These delimiters are often multi-character sequences.
Task
Strip block comments from program text (of a programming language much like classic C).
Your demos should at least handle simple, non-ne... | #Perl | Perl | #!/usr/bin/perl -w
use strict ;
use warnings ;
open( FH , "<" , "samplecode.txt" ) or die "Can't open file!$!\n" ;
my $code = "" ;
{
local $/ ;
$code = <FH> ; #slurp mode
}
close FH ;
$code =~ s,/\*.*?\*/,,sg ;
print $code . "\n" ; |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Coco | Coco | size = 'little'
console.log "Mary had a #size lamb." |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #CoffeeScript | CoffeeScript |
size = 'little'
console.log "Mary had a #{size} lamb." # Mary had a little lamb.
console.log "Escaping: \#{}" # Escaping: #{}
console.log 'No #{ interpolation} with single quotes' # No #{ interpolation} with single quotes
# Multi-line strings and arbtrary expressions work: 20
console.log """
Multi-line strings an... |
http://rosettacode.org/wiki/String_interpolation_(included) | String interpolation (included) |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Common_Lisp | Common Lisp | (let ((extra "little"))
(format t "Mary had a ~A lamb.~%" extra)) |
http://rosettacode.org/wiki/Sum_to_100 | Sum to 100 | Task
Find solutions to the sum to one hundred puzzle.
Add (insert) the mathematical
operators + or - (plus
or minus) before any of the digits in the
decimal numeric string 123456789 such that the
resulting mathematical expression adds up to a
particular sum (in this iconic case, ... | #Wren | Wren | import "/dynamic" for Enum
import "/fmt" for Fmt
import "/set" for Set
import "/math" for Nums
import "/sort" for Sort
var Op = Enum.create("Op", ["ADD", "SUB", "JOIN"])
var NUMBER_OF_DIGITS = 9
var THREE_POW_4 = 3 * 3 * 3 * 3
var NUMBER_OF_EXPRESSIONS = 2 * THREE_POW_4 * THREE_POW_4
class Expression {
static... |
http://rosettacode.org/wiki/Strip_a_set_of_characters_from_a_string | Strip a set of characters from a string | Task
Create a function that strips a set of characters from a string.
The function should take two arguments:
a string to be stripped
a string containing the set of characters to be stripped
The returned string should contain the first string, stripped of any characters in the second argument:
print str... | #D | D | import std.stdio, std.string;
void main() {
auto s = "She was a soul stripper. She took my heart!";
auto ss = "Sh ws soul strppr. Sh took my hrt!";
assert(s.removechars("aei") == ss);
} |
http://rosettacode.org/wiki/Strip_a_set_of_characters_from_a_string | Strip a set of characters from a string | Task
Create a function that strips a set of characters from a string.
The function should take two arguments:
a string to be stripped
a string containing the set of characters to be stripped
The returned string should contain the first string, stripped of any characters in the second argument:
print str... | #Delphi | Delphi | program StripCharacters;
{$APPTYPE CONSOLE}
uses SysUtils;
function StripChars(const aSrc, aCharsToStrip: string): string;
var
c: Char;
begin
Result := aSrc;
for c in aCharsToStrip do
Result := StringReplace(Result, c, '', [rfReplaceAll, rfIgnoreCase]);
end;
const
TEST_STRING = 'She was a soul strip... |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #jq | jq | "world!" as $s
| "Hello " + $s |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Julia | Julia | s = "world!"
s = "Hello " * s |
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #K | K |
s: "world!"
"world!"
"Hello " , s
"Hello world!"
|
http://rosettacode.org/wiki/String_prepend | String prepend |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Kotlin | Kotlin | // version 1.0.6
fun main(args: Array<String>) {
var s = "Obama"
s = "Barack " + s
println(s)
// It's also possible to use this standard library function
// though this is not what it's really intended for
var t = "Trump"
t = t.prependIndent("Donald ")
println(t)
} |
http://rosettacode.org/wiki/String_comparison | String comparison |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Burlesque | Burlesque |
blsq ) "abc""abc"==
1
blsq ) "abc""abc"!=
0
blsq ) "abc""Abc"cm
1
blsq ) "ABC""Abc"cm
-1
|
http://rosettacode.org/wiki/String_comparison | String comparison |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #C | C |
/* WRONG! */
if (strcmp(a,b)) action_on_equality();
|
http://rosettacode.org/wiki/String_case | String case | Task
Take the string alphaBETA and demonstrate how to convert it to:
upper-case and
lower-case
Use the default encoding of a string literal or plain ASCII if there is no string literal in your language.
Note: In some languages alphabets toLower and toUpper is not reversable.
Show any additional... | #BASIC | BASIC | s$ = "alphaBETA"
PRINT UCASE$(s$)
PRINT LCASE$(s$) |
http://rosettacode.org/wiki/String_case | String case | Task
Take the string alphaBETA and demonstrate how to convert it to:
upper-case and
lower-case
Use the default encoding of a string literal or plain ASCII if there is no string literal in your language.
Note: In some languages alphabets toLower and toUpper is not reversable.
Show any additional... | #BCPL | BCPL | get "libhdr"
// Check whether a character is an upper or lowercase letter
let islower(x) = 'a' <= x <= 'z'
let isupper(x) = 'A' <= x <= 'Z'
// Convert a character to upper or lowercase
let toupper(x) = islower(x) -> x - 32, x
let tolower(x) = isupper(x) -> x + 32, x
// Map a character function over a string
let s... |
http://rosettacode.org/wiki/String_matching | String matching |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Bracmat | Bracmat | ( (sentence="I want a number such that that number will be even.")
& out$(@(!sentence:I ?) & "sentence starts with 'I'" | "sentence does not start with 'I'")
& out$(@(!sentence:? such ?) & "sentence contains 'such'" | "sentence does not contain 'such'")
& out$(@(!sentence:? "even.") & "sentence ends with 'even.'" | "se... |
http://rosettacode.org/wiki/String_matching | String matching |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #C | C | #include <string.h>
#include <stdio.h>
int startsWith(const char* container, const char* target)
{
size_t clen = strlen(container), tlen = strlen(target);
if (clen < tlen)
return 0;
return strncmp(container, target, tlen) == 0;
}
int endsWith(const char* container, const char* target)
{
size_t clen = st... |
http://rosettacode.org/wiki/String_length | String length | Task
Find the character and byte length of a string.
This means encodings like UTF-8 need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters.
By character, we mean an individual Unicode code point, not a user-visible grapheme containing combining characters.
F... | #Axe | Axe | "HELLO, WORLD"→Str1
Disp length(Str1)▶Dec,i |
http://rosettacode.org/wiki/String_length | String length | Task
Find the character and byte length of a string.
This means encodings like UTF-8 need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters.
By character, we mean an individual Unicode code point, not a user-visible grapheme containing combining characters.
F... | #BaCon | BaCon | PRINT "Bytelen of 'hello': ", LEN("hello")
PRINT "Charlen of 'hello': ", ULEN("hello")
PRINT "Bytelen of 'møøse': ", LEN("møøse")
PRINT "Charlen of 'møøse': ", ULEN("møøse")
PRINT "Bytelen of '𝔘𝔫𝔦𝔠𝔬𝔡𝔢': ", LEN("𝔘𝔫𝔦𝔠𝔬𝔡𝔢")
PRINT "Charlen of '𝔘𝔫𝔦𝔠𝔬𝔡𝔢': ", ULEN("𝔘𝔫𝔦𝔠𝔬𝔡𝔢") |
http://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string | Strip control codes and extended characters from a string | Task
Strip control codes and extended characters from a string.
The solution should demonstrate how to achieve each of the following results:
a string with control codes stripped (but extended characters not stripped)
a string with control codes and extended characters stripped
In ASCII, the control codes ... | #Java | Java | import java.util.function.IntPredicate;
public class StripControlCodes {
public static void main(String[] args) {
String s = "\u0000\n abc\u00E9def\u007F";
System.out.println(stripChars(s, c -> c > '\u001F' && c != '\u007F'));
System.out.println(stripChars(s, c -> c > '\u001F' && c < '\u... |
http://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string | Strip control codes and extended characters from a string | Task
Strip control codes and extended characters from a string.
The solution should demonstrate how to achieve each of the following results:
a string with control codes stripped (but extended characters not stripped)
a string with control codes and extended characters stripped
In ASCII, the control codes ... | #JavaScript | JavaScript | (function (strTest) {
// s -> s
function strip(s) {
return s.split('').filter(function (x) {
var n = x.charCodeAt(0);
return 31 < n && 127 > n;
}).join('');
}
return strip(strTest);
})("\ba\x00b\n\rc\fd\xc3"); |
http://rosettacode.org/wiki/String_concatenation | String concatenation | String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
Task
Create a string variable equal to any text value.
Create another string variable whose value is the original variable concatenated with another string literal.
To illustrate the operat... | #Common_Lisp | Common Lisp | (let ((s "hello"))
(format t "~a there!~%" s)
(let* ((s2 " there!")
(s (concatenate 'string s s2)))
(format t "~a~%" s))) |
http://rosettacode.org/wiki/String_concatenation | String concatenation | String concatenation
You are encouraged to solve this task according to the task description, using any language you may know.
Task
Create a string variable equal to any text value.
Create another string variable whose value is the original variable concatenated with another string literal.
To illustrate the operat... | #Component_Pascal | Component Pascal |
MODULE StringConcatenation;
IMPORT StdLog;
PROCEDURE Do*;
VAR
str1,str2: ARRAY 128 OF CHAR;
BEGIN
str1 := "Hello";
str2 := str1 + " world";
StdLog.String(":> " + str2);StdLog.Ln
END Do;
END StringConcatenation.
|
http://rosettacode.org/wiki/Sum_multiples_of_3_and_5 | Sum multiples of 3 and 5 | Task
The objective is to write a function that finds the sum of all positive multiples of 3 or 5 below n.
Show output for n = 1000.
This is is the same as Project Euler problem 1.
Extra credit: do this efficiently for n = 1e20 or higher.
| #Limbo | Limbo | implement Sum3and5;
include "sys.m"; sys: Sys;
include "draw.m";
include "ipints.m"; ipints: IPints;
IPint: import ipints;
Sum3and5: module {
init: fn(nil: ref Draw->Context, args: list of string);
};
ints: array of ref IPint;
init(nil: ref Draw->Context, args: list of string)
{
sys = load Sys Sys->PATH;
ip... |
http://rosettacode.org/wiki/Sum_digits_of_an_integer | Sum digits of an integer | Task
Take a Natural Number in a given base and return the sum of its digits:
110 sums to 1
123410 sums to 10
fe16 sums to 29
f0e16 sums to 29
| #LiveCode | LiveCode | function sumDigits n, base
local numb
if base is empty then put 10 into base
repeat for each char d in n
add baseConvert(d,base,10) to numb
end repeat
return numb
end sumDigits |
http://rosettacode.org/wiki/Sum_digits_of_an_integer | Sum digits of an integer | Task
Take a Natural Number in a given base and return the sum of its digits:
110 sums to 1
123410 sums to 10
fe16 sums to 29
f0e16 sums to 29
| #Logo | Logo | make "digits "0123456789abcdefghijklmnopqrstuvwxyz
to digitvalue :digit
output difference find [equal? :digit item ? :digits] iseq 1 count :digits 1
end
to sumdigits :number [:base 10]
output reduce "sum map.se "digitvalue :number
end
foreach [1 1234 fe f0e] [print (se ? "-> sumdigits ?)] |
http://rosettacode.org/wiki/Sum_of_squares | Sum of squares | Task
Write a program to find the sum of squares of a numeric vector.
The program should work on a zero-length vector (with an answer of 0).
Related task
Mean
| #Mathematica.2FWolfram_Language | Mathematica/Wolfram Language | SumOfSquares[x_]:=Total[x^2]
SumOfSquares[{1,2,3,4,5}] |
http://rosettacode.org/wiki/Sum_of_squares | Sum of squares | Task
Write a program to find the sum of squares of a numeric vector.
The program should work on a zero-length vector (with an answer of 0).
Related task
Mean
| #MATLAB | MATLAB | function [squaredSum] = sumofsquares(inputVector)
squaredSum = sum( inputVector.^2 ); |
http://rosettacode.org/wiki/Strip_whitespace_from_a_string/Top_and_tail | Strip whitespace from a string/Top and tail | Task
Demonstrate how to strip leading and trailing whitespace from a string.
The solution should demonstrate how to achieve the following three results:
String with leading whitespace removed
String with trailing whitespace removed
String with both leading and trailing whitespace removed
For the purposes of thi... | #Gambas | Gambas | Public Sub Main()
Dim sString As String = " Hello world! "
Print sString & "\tString length = " & Len(sString) & " - Original string"
Print LTrim(sString) & "\tString length = " & Len(LTrim(sString)) & " - String with leading whitespace removed"
Print RTrim(sString) & "\tString length = " & Len(RTrim(sString)) ... |
http://rosettacode.org/wiki/Strip_whitespace_from_a_string/Top_and_tail | Strip whitespace from a string/Top and tail | Task
Demonstrate how to strip leading and trailing whitespace from a string.
The solution should demonstrate how to achieve the following three results:
String with leading whitespace removed
String with trailing whitespace removed
String with both leading and trailing whitespace removed
For the purposes of thi... | #Go | Go | package main
import (
"fmt"
"strings"
"unicode"
)
var simple = `
simple `
func main() {
show("original", simple)
show("leading ws removed", strings.TrimLeftFunc(simple, unicode.IsSpace))
show("trailing ws removed", strings.TrimRightFunc(simple, unicode.IsSpace))
// equivalent to ... |
http://rosettacode.org/wiki/Strong_and_weak_primes | Strong and weak primes |
Definitions (as per number theory)
The prime(p) is the pth prime.
prime(1) is 2
prime(4) is 7
A strong prime is when prime(p) is > [prime(p-1) + prime(p+1)] ÷ 2
A weak prime is when prime(p) is < [prime(p-1) + prime(p+1)] ÷ 2
Note that the defin... | #Swift | Swift | import Foundation
class PrimeSieve {
var composite: [Bool]
init(size: Int) {
composite = Array(repeating: false, count: size/2)
var p = 3
while p * p <= size {
if !composite[p/2 - 1] {
let inc = p * 2
var q = p * p
while q <... |
http://rosettacode.org/wiki/Strong_and_weak_primes | Strong and weak primes |
Definitions (as per number theory)
The prime(p) is the pth prime.
prime(1) is 2
prime(4) is 7
A strong prime is when prime(p) is > [prime(p-1) + prime(p+1)] ÷ 2
A weak prime is when prime(p) is < [prime(p-1) + prime(p+1)] ÷ 2
Note that the defin... | #Wren | Wren | import "/math" for Int
import "/fmt" for Fmt
var primes = Int.primeSieve(1e7 + 19) // next prime above 10 million
var strong = []
var weak = []
for (p in 1...primes.count-1) {
if (primes[p] > (primes[p-1] + primes[p+1]) / 2) {
strong.add(primes[p])
} else if (primes[p] < (primes[p-1] + primes[p+1]) / ... |
http://rosettacode.org/wiki/Substring | Substring |
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |... | #Delphi | Delphi | program ShowSubstring;
{$APPTYPE CONSOLE}
uses SysUtils;
const
s = '0123456789';
n = 3;
m = 4;
c = '2';
sub = '456';
begin
Writeln(Copy(s, n, m)); // starting from n characters in and of m length;
Writeln(Copy(s, n, Length(s))); // starting from n characters in, up to the end of the ... |
http://rosettacode.org/wiki/Sudoku | Sudoku | Task
Solve a partially filled-in normal 9x9 Sudoku grid and display the result in a human-readable format.
references
Algorithmics of Sudoku may help implement this.
Python Sudoku Solver Computerphile video.
| #FutureBasic | FutureBasic |
include "ConsoleWindow"
include "NSLog.incl"
include "Util_Containers.incl"
begin globals
dim as container gC
end globals
BeginCDeclaration
short solve_sudoku(short i);
short check_sudoku(short r, short c);
CFMutableStringRef print_sudoku();
EndC
BeginCFunction
short sudoku[9][9] = {
{3,0... |
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