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_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... | #J | J | NB. sum of reciprocals of squares of first thousand positive integers
+/ % *: >: i. 1000
1.64393
(*:o.1)%6 NB. pi squared over six, for comparison
1.64493
1r6p2 NB. As a constant (J has a rich constant notation)
1.64493 |
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... | #Ring | Ring |
aList = 'apples, pears # and bananas'
see aList + nl
see stripComment(aList) + nl
aList = 'apples, pears // and bananas'
see aList + nl
see stripComment(aList) + nl
func stripComment bList
nr = substr(bList,"#")
if nr > 0 cList = substr(bList,1,nr-1) ok
nr = substr(bList,"//")
if nr > 0 cList =... |
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... | #Ruby | Ruby | class String
def strip_comment( markers = ['#',';'] )
re = Regexp.union( markers ) # construct a regular expression which will match any of the markers
if index = (self =~ re)
self[0, index].rstrip # slice the string where the regular expression matches, and return it.
else
rstrip
end... |
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... | #Rust | Rust | fn strip_comment<'a>(input: &'a str, markers: &[char]) -> &'a str {
input
.find(markers)
.map(|idx| &input[..idx])
.unwrap_or(input)
.trim()
}
fn main() {
println!("{:?}", strip_comment("apples, pears # and bananas", &['#', ';']));
println!("{:?}", strip_comment("apples, pe... |
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... | #Wren | Wren | var stripper = Fn.new { |start, end|
if (start == "" || end == "") {
start = "/*"
end = "*/"
}
return Fn.new { |source|
while (true) {
var cs = source.indexOf(start)
if (cs == -1) break
var ce = source[cs+2..-1].indexOf(end)
if (ce ==... |
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... | #XProfan | XProfan | Proc strip_block_comments
Parameters string inhalt, beg_delim, end_delim
Declare long start, ende, anzahl
start = 1
start = InStr(beg_delim, inhalt, start)
While start > 0
ende = InStr(end_delim, inhalt, start + len(beg_delim))
If ende > 0
anzahl = ende + + len(end_delim) - start
... |
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 |... | #Haxe | Haxe | class Program {
static function main() {
var extra = 'little';
var formatted = 'Mary had a $extra lamb.';
Sys.println(formatted);
}
} |
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 |... | #HicEst | HicEst | CHARACTER original="Mary had a X lamb", little = "little", output_string*100
output_string = original
EDIT(Text=output_string, Right='X', RePLaceby=little) |
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 |... | #Icon_and_Unicon | Icon and Unicon | s2 := "humongous"
s3 := "little"
s1 := "Mary had a humongous lamb."
s1 ?:= tab(find(s2)) || (=s2,s3) || tab(0) # replaces the first instance of s2 with s3
while s1 ?:= tab(find(s2)) || (=s2,s3) || tab(0) # replaces all instances of s2 with s3, equivalent to replace |
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... | #Java | Java | class StripChars {
public static String stripChars(String inString, String toStrip) {
return inString.replaceAll("[" + toStrip + "]", "");
}
public static void main(String[] args) {
String sentence = "She was a soul stripper. She took my heart!";
String chars = "aei";
Syste... |
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... | #JavaScript | JavaScript | function stripchars(string, chars) {
return string.replace(RegExp('['+chars+']','g'), '');
} |
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 |... | #Ring | Ring |
aString = "World!"
bString = "Hello, " + aString
see bString + nl
|
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 |... | #Ruby | Ruby | str = "llo world"
str.prepend("He")
p str #=> "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 |... | #Rust | Rust |
let mut s = "World".to_string();
s.insert_str(0, "Hello ");
println!("{}", 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 |... | #Scala | Scala | val s = "World" // Immutables are recommended //> s : String = World
val f2 = () => ", " //Function assigned to variable
//> f2 : () => String = <function0>
val s1 = "Hello" + f2() + s //> s1 : String = Hello, World
println(s1); ... |
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 |... | #FreeBASIC | FreeBASIC | ' FB 1.05.0
' Strings in FB natively support the relational operators which compare lexically on a case-sensitive basis.
' There are no special provisions for numerical strings.
' There are no other types of string comparison for the built-in types though 'user defined types'
' can specify their own comparisons by ov... |
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... | #E | E | ["alphaBETA".toUpperCase(),
"alphaBETA".toLowerCase()] |
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... | #EchoLisp | EchoLisp |
(string-downcase "alphaBETA")
→ "alphabeta"
(string-upcase "alphaBETA")
→ "ALPHABETA"
(string-titlecase "alphaBETA")
→ "Alphabeta"
(string-randcase "alphaBETA")
→ "alphaBEtA"
(string-randcase "alphaBETA")
→ "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 |... | #Elena | Elena | import extensions;
public program()
{
var s := "abcd";
console.printLine(s," starts with ab: ",s.startingWith:"ab");
console.printLine(s," starts with cd: ",s.startingWith:"cd");
console.printLine(s," ends with ab: ",s.endingWith:"ab");
console.printLine(s," ends with cd: ",s.endingWith:"cd");... |
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 |... | #Elixir | Elixir | s1 = "abcd"
s2 = "adab"
s3 = "ab"
String.starts_with?(s1, s3)
# => true
String.starts_with?(s2, s3)
# => false
String.contains?(s1, s3)
# => true
String.contains?(s2, s3)
# => true
String.ends_with?(s1, s3)
# => false
String.ends_with?(s2, s3)
# => true
# Optional requirements:
Regex.run(~r/#{s3}/, s1, return... |
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... | #D | D | import std.stdio;
void showByteLen(T)(T[] str) {
writefln("Byte length: %2d - %(%02x%)",
str.length * T.sizeof, cast(ubyte[])str);
}
void main() {
string s1a = "møøse"; // UTF-8
showByteLen(s1a);
wstring s1b = "møøse"; // UTF-16
showByteLen(s1b);
dstring s1c = "møøse"; // UTF-32... |
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 ... | #PureBasic | PureBasic | Procedure.s stripControlCodes(source.s)
Protected i, *ptrChar.Character, length = Len(source), result.s
*ptrChar = @source
For i = 1 To length
If *ptrChar\c > 31
result + Chr(*ptrChar\c)
EndIf
*ptrChar + SizeOf(Character)
Next
ProcedureReturn result
EndProcedure
Procedure.s stripControlE... |
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... | #FreeBASIC | FreeBASIC | ' FB 1.05.0 Win64
Var s1 = "String"
Var s2 = s1 + " concatenation"
Print s1
Print s2
Sleep |
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... | #Frink | Frink |
a = "Frink"
b = a + " rules!"
println[b]
|
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.
| #Nim | Nim | proc sum35(n: int): int =
for x in 0 ..< n:
if x mod 3 == 0 or x mod 5 == 0:
result += x
echo sum35(1000) |
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
| #Ol | Ol |
(define (sum n base)
(if (zero? n)
n
(+ (mod n base) (sum (div n base) base))))
(print (sum 1 10))
; ==> 1
(print (sum 1234 10))
; ==> 10
(print (sum #xfe 16))
; ==> 29
(print (sum #xf0e 16))
; ==> 29
|
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
| #PARI.2FGP | PARI/GP | ss(v)={
sum(i=1,#v,v[i]^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... | #MATLAB_.2F_Octave | MATLAB / Octave | % remove trailing whitespaces
str = str(1:find(~isspace(str),1,'last'));
% remove leading whitespaces
str = str(find(~isspace(str),1):end);
% removes leading and trailing whitespaces, vectorized version
f = ~isspace(str);
str = str(find(f,1,'first'):find(f,1,'last');
% a built-in function,... |
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... | #Mercury | Mercury | :- module top_and_tail.
:- interface.
:- import_module io.
:- pred main(io::di, io::uo) is det.
:- implementation.
:- import_module list, string.
main(!IO) :-
TestPhrase = "\t\r\n String with spaces \t\r\n ",
io.format("leading ws removed: %s\n", [s(lstrip(TestPhrase))], !IO),
io.format("trailing ws remo... |
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 |... | #Frink | Frink | test = "🐱abcdefg😾"
n = 3
m = 2
println[substrLen[test, n, m]]
println[right[test, -m]]
println[left[test, -1]]
pos = indexOf["c"]
if pos != -1
println[substrLen[test, pos, m]]
pos = indexOf[test, "cd"]
if pos != -1
println[substrLen[test, pos, m]]
|
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 |... | #Gambas | Gambas | Public Sub Main()
Dim sString As String = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"
Print Mid(sString, 11, 5) 'Starting from n characters in and of m length
Print Mid(sString, 17) 'Starting from n characters in, up to the end of the string
Print Left(sString, -1) ... |
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.
| #MATLAB | MATLAB | function solution = sudokuSolver(sudokuGrid)
%Define what each of the sub-boxes of the sudoku grid are by defining
%the start and end coordinates of each sub-box. The indecies represent
%the column and row of a grid coordinate on the actual sudoku grid.
%The contents of each cell with the same grid co... |
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... | #R | R |
mem <- c(15, 17, -1, 17, -1, -1, 16, 1,
-1, 16, 3, -1, 15, 15, 0, 0,
-1, 72, 101, 108, 108, 111, 44,
32, 119, 111, 114, 108, 100,
33, 10, 0)
getFromMemory <- function(addr) { mem[[addr + 1]] } # because first element in mem is mem[[1]]
setMemory <- function(addr, value) { me... |
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... | #MATLAB_.2F_Octave | MATLAB / Octave |
% String with first character removed
str(2:end)
% String with last character removed
str(1:end-1)
% String with both the first and last characters removed
str(2:end-1)
|
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... | #MiniScript | MiniScript | test = "This thing"
print test[1:]
print test[:-1]
print test[1:-1]
|
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.
| #Maxima | Maxima | lreduce("+", [1, 2, 3, 4, 5, 6, 7, 8]);
36
lreduce("*", [1, 2, 3, 4, 5, 6, 7, 8]);
40320 |
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.
| #MAXScript | MAXScript | arr = #(1, 2, 3, 4, 5)
sum = 0
for i in arr do sum += i
product = 1
for i in arr do product *= 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... | #Java | Java | public class Sum{
public static double f(double x){
return 1/(x*x);
}
public static void main(String[] args){
double start = 1;
double end = 1000;
double sum = 0;
for(double x = start;x <= end;x++) sum += f(x);
System.out.println("Sum of f(x) from " + start + ... |
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... | #Scala | Scala | object StripComments {
def stripComments1(s:String, markers:String =";#")=s takeWhile (!markers.contains(_)) trim
// using regex and pattern matching
def stripComments2(s:String, markers:String =";#")={
val R=("(.*?)[" + markers + "].*").r
(s match {
case R(line) => line
case _ => s
}) t... |
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... | #Scheme | Scheme | (use-modules (ice-9 regex))
(define (strip-comments s)
(regexp-substitute #f
(string-match "[ \t\r\n\v\f]*[#;].*" s) 'pre "" 'post))
(display (strip-comments "apples, pears # and bananas"))(newline)
(display (strip-comments "apples, pears ; and bananas"))(newline) |
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... | #zkl | zkl | fcn stripper(text, a="/*", b="*/"){
while(xy:=text.span(a,b,True)){ x,y:=xy; text=text[0,x] + text[x+y,*] }
text
} |
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 |... | #J | J | require 'printf'
'Mary had a %s lamb.' sprintf <'little'
Mary had a little lamb.
require 'strings'
('%s';'little') stringreplace 'Mary had a %s lamb.'
Mary had a little lamb.
'Mary had a %s lamb.' rplc '%s';'little'
Mary had a little 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 |... | #Java | Java | String original = "Mary had a X lamb";
String little = "little";
String replaced = original.replace("X", little); //does not change the original String
System.out.println(replaced);
//Alternative:
System.out.printf("Mary had a %s lamb.", little);
//Alternative:
String formatted = String.format("Mary had a %s lamb.", li... |
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... | #jq | jq | def stripchars(string; banish):
(string | explode) - (banish | explode) | implode; |
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... | #Julia | Julia | stripChar = (s, r) -> replace(s, Regex("[$r]") => "") |
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 |... | #Seed7 | Seed7 | $ include "seed7_05.s7i";
const proc: main is func
local
var string: s is "world!";
begin
s := "Hello " & s;
writeln(s);
end func; |
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 |... | #Sidef | Sidef | var str = 'llo!';
str.sub!(/^/, 'He');
say str; |
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 |... | #SNOBOL4 | SNOBOL4 | s = ', World!'
OUTPUT = s = 'Hello' s
END |
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 |... | #Standard_ML | Standard ML |
> val s="any text" ;
val s = "any text": string
> "prepended " ^ s;
val it = "prepended any text": string
|
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 |... | #Stata | Stata | sca s="Vita Brevis"
sca s="Ars Longa "+s
di s
Ars Longa Vita Brevis |
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 |... | #Go | Go | package main
import (
"fmt"
"strings"
)
func main() {
// Go language string comparison operators:
c := "cat"
d := "dog"
if c == d {
fmt.Println(c, "is bytewise identical to", d)
}
if c != d {
fmt.Println(c, "is bytewise different from", d)
}
if c > d {
... |
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... | #ECL | ECL | IMPORT STD; //Imports the Standard Library
STRING MyBaseString := 'alphaBETA';
UpperCased := STD.str.toUpperCase(MyBaseString);
LowerCased := STD.str.ToLowerCase(MyBaseString);
TitleCased := STD.str.ToTitleCase(MyBaseString);
OUTPUT (UpperCased);
OUTPUT (LowerCased);
OUTPUT (TitleCased); |
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... | #Elena | Elena | import system'culture;
public program()
{
string s1 := "alphaBETA";
// Alternative 1
console.writeLine(s1.lowerCase());
console.writeLine(s1.upperCase());
// Alternative 2
console.writeLine(s1.toLower(currentLocale));
console.writeLine(s1.toUpper(currentLocale));
console.readChar()... |
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 |... | #Emacs_Lisp | Emacs Lisp | (defun string-contains (needle haystack)
(string-match (regexp-quote needle) haystack))
(string-prefix-p "before" "before center after") ;=> t
(string-contains "before" "before center after") ;=> 0
(string-suffix-p "before" "before center after") ;=> nil
(string-prefix-p "center" "before center after") ;=> nil
(s... |
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... | #DataWeave | DataWeave | sizeOf("foo") |
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... | #Dc | Dc | [256 / d 0<L 1 + ] sL
22405534230753963835153736737 d P A P
lL x f |
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 ... | #Python | Python | stripped = lambda s: "".join(i for i in s if 31 < ord(i) < 127)
print(stripped("\ba\x00b\n\rc\fd\xc3")) |
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 ... | #Racket | Racket |
#lang racket
;; Works on both strings (Unicode) and byte strings (raw/ASCII)
(define (strip-controls str)
(regexp-replace* #rx"[\0-\037\177]+" str ""))
(define (strip-controls-and-extended str)
(regexp-replace* #rx"[^\040-\176]+" str ""))
|
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... | #FutureBasic | FutureBasic | window 1
CFStringRef s1, s2
s1 = @"any text value "
print s1
s2 = fn StringByAppendingString( s1, @"another string literal" )
print s2
HandleEvents |
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... | #Gambas | Gambas | Public sub main()
DIM bestclub AS String
DIM myconcat AS String
bestclub = "Liverpool"
myconcat = bestclub & " Football Club"
Print myconcat
End |
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... | #GlovePIE | GlovePIE | var.text1="Hello, "
debug=var.text1+"world!" |
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.
| #Objeck | Objeck | class SumMultiples {
function : native : GetSum(n : Int) ~ Int {
sum := 0;
for(i := 3; i < n; i++;) {
if(i % 3 = 0 | i % 5 = 0) {
sum += i;
};
};
return sum;
}
function : Main(args : String[]) ~ Nil {
GetSum(1000)->PrintLine();
}
}
|
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
| #PARI.2FGP | PARI/GP | dsum(n,base)=my(s); while(n, s += n%base; n \= base); s |
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
| #Pascal | Pascal | Program Example45;
{ Program to demonstrate the SumOfSquares function. }
Uses math;
Var
I : 1..100;
ExArray : Array[1..100] of Float;
begin
Randomize;
for I:=low(ExArray) to high(ExArray) do
ExArray[i]:=(Random-Random)*100;
Writeln('Max : ',MaxValue(ExArray):8:4);
Writeln('Min ... |
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... | #Nemerle | Nemerle | def str = "\t\n\t A string with\nwhitespace\n\n\t ";
WriteLine(str.TrimStart());
WriteLine(str.TrimEnd());
WriteLine(str.Trim()); // both ends at once, of course, internal whitespace is preserved in all 3 |
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... | #NetRexx | NetRexx | /* NetRexx */
options replace format comments java crossref symbols nobinary
runSample(arg)
return
-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
method stripWhitespace(sstring, soption = 'BOTH') public static
wsChars = getWhitspaceCharacterString()
po1 = sstring.verify(wsChars... |
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 |... | #GAP | GAP | LETTERS;
# "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
LETTERS{[5 .. 10]};
# "EFGHIJ" |
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 |... | #Go | Go | package main
import (
"fmt"
"strings"
)
func main() {
s := "ABCDEFGH"
n, m := 2, 3
// for reference
fmt.Println("Index: ", "01234567")
fmt.Println("String:", s)
// starting from n characters in and of m length
fmt.Printf("Start %d, length %d: %s\n", n, m, s[n : n+m])
// st... |
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.
| #Nim | Nim | {.this: self.}
type
Sudoku = ref object
grid : array[81, int]
solved : bool
proc `$`(self: Sudoku): string =
var sb: string = ""
for i in 0..8:
for j in 0..8:
sb &= $grid[i * 9 + j]
sb &= " "
if j == 2 or j == 5:
sb &= "| "
sb &= "\n"
if i == 2 or i == 5:
sb... |
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... | #Racket | Racket | #lang racket
(define (subleq v)
(define (mem n)
(vector-ref v n))
(define (mem-set! n x)
(vector-set! v n x))
(let loop ([ip 0])
(when (>= ip 0)
(define m0 (mem ip))
(define m1 (mem (add1 ip)))
(cond
[(< m0 0) (mem-set! m1 (read-byte))
(loop (+ ip 3))]
... |
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... | #Raku | Raku | my @hello-world =
|<15 17 -1 17 -1 -1 16 1 -1 16 3 -1 15 15 0 0 -1>,
|"Hello, world!\n\0".comb.map(*.ord);
sub run-subleq(@memory) {
my $ip = 0;
while $ip >= 0 && $ip < @memory {
my ($a, $b, $c) = @memory[$ip..*];
$ip += 3;
if $a < 0 {
@memory[$b] = getc.ord;
} elsif $b < 0 {
print @m... |
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... | #Neko | Neko | /**
Subtring/Top-Tail in Neko
*/
var data = "[this is a test]"
var len = $ssize(data)
$print(data, "\n")
$print($ssub(data, 1, len - 1), "\n")
$print($ssub(data, 0, len - 1), "\n")
$print($ssub(data, 1, len - 2), "\n") |
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... | #Nemerle | Nemerle | using System;
using System.Console;
module RemoveChars
{
Main() : void
{
def str = "*A string*";
def end = str.Remove(str.Length - 1); // from pos to end
def beg = str.Remove(0, 1); // start pos, # of chars to remove
def both = str.Trim(array['*']); // with Tr... |
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.
| #min | min | (1 2 3 4 5) ((sum) (1 '* reduce)) cleave
"Sum: $1\nProduct: $2" get-stack % puts |
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.
| #.D0.9C.D0.9A-61.2F52 | МК-61/52 | ^ 1 ПE + П0 КИП0 x#0 18 ^ ИПD
+ ПD <-> ИПE * ПE БП 05 С/П |
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... | #JavaScript | JavaScript | function sum(a,b,fn) {
var s = 0;
for ( ; a <= b; a++) s += fn(a);
return s;
}
sum(1,1000, function(x) { return 1/(x*x) } ) // 1.64393456668156 |
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... | #sed | sed | #!/bin/sh
# Strip comments
echo "$1" | sed 's/ *[#;].*$//g' | sed '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... | #Seed7 | Seed7 | $ include "seed7_05.s7i";
const func string: stripComment (in string: line) is func
result
var string: lineWithoutComment is "";
local
var integer: lineEnd is 0;
var integer: pos is 0;
begin
lineEnd := length(line);
for pos range 1 to length(line) do
if line[pos] in {'#', ';'} then
... |
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... | #Sidef | Sidef | func strip_comment(s) {
(s - %r'[#;].*').strip;
}
[" apples, pears # and bananas",
" apples, pears ; and bananas",
" apples, pears "].each { |s|
say strip_comment(s).dump;
}; |
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 |... | #JavaScript | JavaScript | var original = "Mary had a X lamb";
var little = "little";
var replaced = original.replace("X", little); //does not change the original string |
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 |... | #jq | jq | "little" as $x
| "Mary had a \($x) lamb" |
http://rosettacode.org/wiki/Strip_a_set_of_characters_from_a_string | Strip a set of characters from a string | Task
Create a function that strips a set of characters from a string.
The function should take two arguments:
a string to be stripped
a string containing the set of characters to be stripped
The returned string should contain the first string, stripped of any characters in the second argument:
print str... | #Kotlin | Kotlin | // version 1.0.6
fun stripChars(s: String, r: String) = s.replace(Regex("[$r]"), "")
fun main(args: Array<String>) {
println(stripChars("She was a soul stripper. She took my heart!", "aei"))
} |
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... | #Lambdatalk | Lambdatalk |
{S.replace (a|e|i)
by // nothing
in She was a soul stripper. She took my heart!}
-> Sh ws soul strppr. Sh took my hrt!
|
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 |... | #Swift | Swift | var str = ", World"
str = "Hello \(str)"
println(str) |
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 |... | #Tcl | Tcl | set s "llo world"
set s "he$s"
puts $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 |... | #Ursa | Ursa | decl string s
# set s to "world"
set s "world"
# prepend "hello "
set s (+ "hello " s)
# outputs "hello world"
out s endl console |
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 |... | #VBA | VBA | Function StringPrepend()
Dim s As String
s = "bar"
s = "foo" & s
Debug.Print s
End Function |
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 |... | #VBScript | VBScript | s = "bar"
s = "foo" & s
WScript.Echo 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 |... | #Harbour | Harbour | IF s1 == s2
? "The strings are equal"
ENDIF
IF !( s1 == s2 )
? "The strings are not equal"
ENDIF
IF s1 > s2
? "s2 is lexically ordered before than s1"
ENDIF
IF s1 < s2
? "s2 is lexically ordered after than s1"
ENDIF |
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 |... | #Haskell | Haskell |
> "abc" == "abc"
True
> "abc" /= "abc"
False
> "abc" <= "abcd"
True
> "abc" <= "abC"
False
> "HELLOWORLD" == "HelloWorld"
False
> :m +Data.Char
> map toLower "ABC"
"abc"
> map toLower "HELLOWORLD" == map toLower "HelloWorld"
True
|
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... | #Elixir | Elixir |
String.downcase("alphaBETA")
# => alphabeta
String.upcase("alphaBETA")
# => ALPHABETA
String.capitalize("alphaBETA")
# => 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... | #Elm | Elm | import String exposing (toLower, toUpper)
s = "alphaBETA"
lower = toLower s
upper = toUpper 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 |... | #Erlang | Erlang |
-module(character_matching).
-export([starts_with/2,ends_with/2,contains/2]).
%% Both starts_with and ends_with are mappings to 'lists:prefix/2' and ... |
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... | #D.C3.A9j.C3.A0_Vu | Déjà Vu | !. len !encode!utf-8 "møøse"
!. len !encode!utf-8 "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 ... | #Raku | Raku | my $str = (0..400).roll(80)».chr.join;
say $str;
say $str.subst(/<:Cc>/, '', :g); # unicode property: control character
say $str.subst(/<-[\ ..~]>/, '', :g); |
http://rosettacode.org/wiki/Strip_control_codes_and_extended_characters_from_a_string | Strip control codes and extended characters from a string | Task
Strip control codes and extended characters from a string.
The solution should demonstrate how to achieve each of the following results:
a string with control codes stripped (but extended characters not stripped)
a string with control codes and extended characters stripped
In ASCII, the control codes ... | #REXX | REXX | /*REXX program strips all "control codes" from a character string (ASCII or EBCDIC). */
z= 'string of ☺☻♥♦⌂, may include control characters and other ♫☼§►↔◄░▒▓█┌┴┐±÷²¬└┬┘ilk.'
@=' !"#$%&''()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~'
$=
do j=1 for length(z); _=subs... |
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... | #Go | Go | package main
import "fmt"
func main() {
// text assigned to a string variable
s := "hello"
// output string variable
fmt.Println(s)
// this output requested by original task descrption, although
// not really required by current wording of task description.
fmt.Println(s + " literal"... |
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... | #Golfscript | Golfscript | "Greetings ":s;
s"Earthlings"+puts
s"Earthlings"+:s1;
s1 puts |
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.
| #OCaml | OCaml | let sum_mults n =
let sum = ref 0 in
for i = 3 to (n - 1) do
if (i mod 3) = 0 || (i mod 5) = 0 then
sum := !sum + i;
done;
!sum;;
print_endline (string_of_int (sum_mults 1000));;
|
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
| #Pascal | Pascal | Program SumOFDigits;
function SumOfDigitBase(n:UInt64;base:LongWord): LongWord;
var
tmp: Uint64;
digit,sum : LongWord;
Begin
digit := 0;
sum := 0;
While n > 0 do
Begin
tmp := n div base;
digit := n-base*tmp;
n := tmp;
inc(sum,digit);
end;
SumOfDigitBase := sum;
end;
Begin
writeln... |
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