如何删除字符串之间的空白字符？

s = " 这是一个字符串  "
s = s.strip()
print(s)

let s = " 这是一个字符串  ";
s = s.trim();
console.log(s);

String s = " 这是一个字符串  ";
s = s.trim();
System.out.println(s);

$s = " 这是一个字符串  ";
$s = trim($s);
echo $s;

string s = " 这是一个字符串  ";
s = s.Trim();
Console.WriteLine(s);

s = " 这是一个字符串  "
s = s.strip
puts s

s := " 这是一个字符串  "
s = strings.TrimSpace(s)
fmt.Println(s)

let s = " 这是一个字符串  "
let trimmedS = s.trimmingCharacters(in: .whitespaces)
print(trimmedS)

val s = " 这是一个字符串  "
val trimmedS = s.trim()
println(trimmedS)

let s = " 这是一个字符串  ";
let trimmed_s = s.trim();
println!("{}", trimmed_s);

#include<iostream>
#include<string>
#include<algorithm>

int main() {
    std::string s = " 这是一个字符串  ";
    s.erase(std::remove_if(s.begin(), s.end(), ::isspace), s.end());
    std::cout << s << std::endl;
    return 0;
}

my $s = " 这是一个字符串  ";
$s =~ s/^\s+|\s+$//g;
print $s;

local s = " 这是一个字符串  "
s = string.gsub(s, "^%s*(.-)%s*$", "%1")
print(s)

import Data.Char (isSpace)

trim :: String -> String
trim = f . f
   where f = reverse . dropWhile isSpace

main :: IO ()
main = putStrLn $ trim " 这是一个字符串  "

-module(trim).
-export([trim_string/1]).

trim_string(S) ->
    re:replace(S, "^\\s+|\\s+$", "", [{return, list}, global]).

main() ->
    S = " 这是一个字符串  ",
    TrimmedS = trim_string(S),
    io:format("~s~n", [TrimmedS]).

defmodule Trim do
  def trim_string(s) do
    String.trim(s)
  end
end

defmodule Main do
  def main() do
    s = " 这是一个字符串  "
    trimmed_s = Trim.trim_string(s)
    IO.puts(trimmed_s)
  end
end

Main.main()

Function TrimString(s As String) As String
    Dim objRegex As Object
    Set objRegex = CreateObject("VBScript.RegExp")
    objRegex.Pattern = "^[\s]*(.*)[\s]*$"
    TrimString = objRegex.Replace(s, "$1")
End Function

Sub Main()
    Dim s As String
    s = " 这是一个字符串  "
    Dim trimmedS As String
    trimmedS = TrimString(s)
    MsgBox trimmedS
End Sub

import 'dart:convert';

String trimString(String s) {
  return s.trim();
}

void main() {
  String s = " 这是一个字符串  ";
  String trimmedS = trimString(s);
  print(trimmedS);
}

function trim_string(s)
    return strip(s)
end

s = " 这是一个字符串  "
trimmed_s = trim_string(s)
println(trimmed_s)

import strutils

proc trimString*(s: string): string =
  result = s.strip()

let s = " 这是一个字符串  "
let trimmedS = trimString(s)
echo trimmedS

let trim_string s =
  String.trim s

let () =
  let s = " 这是一个字符串  " in
  let trimmed_s = trim_string s in
  print_endline trimmed_s

let trimString (s: string) =
    s.Trim()

let s = " 这是一个字符串  "
let trimmedS = trimString s
printfn "%s" trimmedS

trim_string(S, TrimmedS) :-
    atom_chars(S, Chars),
    trim_chars(Chars, TrimmedChars),
    atom_chars(TrimmedS, TrimmedChars).

trim_chars([], []) :- !.
trim_chars(Chars, TrimmedChars) :-
    trim_chars_left(Chars, TrimmedChars1),
    trim_chars_right(TrimmedChars1, TrimmedChars).

trim_chars_left([], []) :- !.
trim_chars_left([C|Chars], TrimmedChars) :-
    (   C =< ' '
    ->  trim_chars_left(Chars, TrimmedChars)
    ;   TrimmedChars = [C|Chars]
    ).

trim_chars_right(Chars, TrimmedChars) :-
    trim_chars_right_1(Chars, [], TrimmedChars).

trim_chars_right_1([], TrimmedChars, TrimmedChars) :- !.
trim_chars_right_1([C|Chars], SoFar, TrimmedChars) :-
    (   C =< ' '
    ->  trim_chars_right_1(Chars, SoFar, TrimmedChars)
    ;   trim_chars_right_1(Chars, [C|SoFar], TrimmedChars)
    ).

main :-
    S = " 这是一个字符串  ",
    trim_string(S, TrimmedS),
    write(TrimmedS), nl.

trim_string <- function(s) {
  gsub("^\\s+|\\s+$", "", s)
}

s <- " 这是一个字符串  "
trimmed_s <- trim_string(s)
cat(trimmed_s)

proc trim_string {s} {
    return [string trim $s]
}

set s " 这是一个字符串  "
set trimmed_s [trim_string $s]
puts $trimmed_s

(define (trim-string s)
  (define (trim-left s)
    (if (and (not (null? s)) (char<=? (car s) #\Space))
        (trim-left (cdr s))
        s))
  (define (trim-right s)
    (if (and (not (null? s)) (char<=? (car s) #\Space))
        (trim-right (cdr s))
        (reverse (trim-left (reverse s)))))
  (list->string (trim-right (trim-left (string->list s)))))

(define s " 这是一个字符串  ")
(define trimmed-s (trim-string s))
(display trimmed-s)

section .data
    s db ' 这是一个字符串  ', 0
    slen equ $ - s

section .bss
    trimmed_s resb slen

section .text
    global _start

_start:
    ; trim left
    lea esi, [s]
    lea edi, [trimmed_s]
    mov ecx, slen
    xor al, al
    cld
    repne scasb
    jne .done
    sub edi, esi
    sub ecx, slen
    rep movsb

    ; trim right
    lea esi, [trimmed_s]
    mov ecx, eax
    lea edi, [esi + ecx - 1]
    std
    repne scasb
    jne .done
    sub edi, esi
    sub ecx, slen
    rep movsb

    ; print trimmed string
    mov eax, 4
    mov ebx, 1
    lea ecx, [trimmed_s]
    mov edx, edi
    int 0x80

    ; exit
    mov eax, 1
    xor ebx, ebx
    int 0x80

.done:
    ; error
    mov eax, 1
    mov ebx, 1
    mov ecx, error_msg
    mov edx, error_len
    int 0x80

section .data
    error_msg db 'Error: Invalid string.', 0
    error_len equ $ - error_msg

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