View source for Remove blanks from a string

{{Infobox See Also String}}
==Implementations==
===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?"
<pre class="c">
#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;
</pre>
or using char pointer you may use the following variant:
<pre class="c">
char *i=(char*)buf, *j=(char*)buf;

do {
  if (*i != ' ')
    *(j++) = *i;
} while (*(i++));
</pre>

===D===
<pre>
 auto a = "hello world! how are you?";
 auto b = a.replace(" ", "");
</pre>

===Erlang===
<pre>
lists:filter(fun(32) -> false; (_) -> true end, "hello world! how are you?")
</pre>

===Haskell===
<pre>
filter (/=' ')
</pre>

For example:
<pre>
Prelude> filter (/=' ') "Remove blanks from a string"
"Removeblanksfromastring"
</pre>

===Java===
<pre class="java">
public static String deleteBlanks(String s) {
    return s.replaceAll("\\s", "");
}
</pre>

===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!"

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

===PHP===
<pre class="php">
 $a = "hello world! how are you?";
 $b = str_replace(" ", "", $a);
</pre>

===Python===
<pre class="python">
 a = "hello world! how are you?"
 b = a.replace(" ", "")
</pre>

===Ruby===
<pre class="ruby">
a = "hello world! how are you?"
b = a.delete(" ")
# or
c = a.gsub(/ /, "")
</pre>

===Seed7===
<pre>
 a := "hello world! how are you?";
 b := replace(a, " ", "");
</pre>

=== Tcl ===
<pre>
 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?"
</pre>

===Visual Basic===
<pre class="vb">
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
</pre>

===WinBatch===
<pre>
; 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.
</pre>

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

[[Category:String]]
[[Category:C]]
[[Category:D]]
[[Category:Erlang]]
[[Category:Haskell]]
[[Category:Java]]
[[Category:Objective Caml]]
[[Category:Perl]]
[[Category:PHP]]
[[Category:Python]]
[[Category:Ruby]]
[[Category:Seed7]]
[[Category:Tcl]]
[[Category:Visual_Basic]]
[[Category:WinBatch]]
[[Category:Zsh]]