Remove blanks from a string

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<DPL>

category=String shownamespace=false </DPL>

Contents

[edit] Implementations

[edit] Haskell

filter (/=' ')

[edit] Java

public static String deleteBlanks(String s) {
    return s.replaceAll("\\s", "");
}

[edit] C

if buff's content is: "he llo wo r ld! how ar e y ou?" then the content of buff_02 will be: "helloworld!howareyou?" 

#include "string.h"

int i=0, j=0;
int len = (int)strlen(buf);

while (i != len) {
  if (buff[i] != ' ')
    buff[j++] = buff[i];
  i++;
}

buff[j]=0;

or using char pointer you may use the following variant: 

char *i=(char*)buf, *j=(char*)buf;

do {
  if (*i != ' ')
    *(j++) = *i;
} while (*(i++));

[edit] D

auto a = "hello world! how are you?";
auto b = a.replace(" ", "");

[edit] OCaml

Use regular expressions to replace sequences of one or more spaces with nothing: 

# let remove_blanks = Str.global_replace (Str.regexp "  ") "";;
val remove_blanks : string -> string = <fun>

For example: 

# remove_blanks "He llo w orl d!";;
- : string = "Helloworld!"

Another solution, using the Micmatch library and the POSIX definition of a blank, i.e. space or tab: 

# let remove_blanks = REPLACE blank -> "";;   
val remove_blanks : ?pos:int -> string -> string = <fun>
# remove_blanks "He llo w orl d!";; 
- : string = "Helloworld!"

Or directly: 

# (REPLACE blank  -> "") "He llo w orl d!";;
- : string = "Helloworld!"

For replacing spaces only, use the following variant: 

# (REPLACE " "  -> "") "He llo w orl d!";;                        
- : string = "Helloworld!"


[edit] PHP

$a = "hello world! how are you?";
$b = str_replace(" ", "", $a);


[edit] Python

a = "hello world! how are you?"
b = a.replace(" ", "")

[edit] Perl

$a = "hello world! how are you?";
$a =~ s/ +//g;

[edit] Seed7

a := "hello world! how are you?";
b := replace(a, " ", "");

[edit] Tcl 

proc remove_blank_using_list s {join [split $s " "] ""}

proc remove_blank_using_regsub s {regsub -all " " $s ""}

remove_blank_using_list "hello world! how are you?"
remove_blank_using_regsub "hello world! how are you?"

[edit] Visual Basic

sString = Replace(sString, " ", "")

e.g. function to remove spaces from a string:

Public Function RemoveSpaces(sString as String) As String
    RemoveSpaces = Replace(sString, " ", "")
End Function

Or to replace double spaces with single spaces:

Public Function RemoveDoubleSpaces(sString as String) As String
    RemoveSpaces = Replace(sString, "  ", " ")
End Function

[edit] WinBatch

; Remove blanks from a string
strString = "Hello,    World!   I  am  here, where are you?  "
strString = StrReplace (strString, " ", "") ; "Hello,World!Iamhere,whereareyou?"

; This code example was written by Detlev Dalitz.

[edit] Zsh

a="Hello, World! How are you?"
b=${a// /}
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