如何防止 JavaScript 中正则表达式中的空格？

Question

I have this JavaScript code below to remove spaces in the given words (ستاک ئەڤەفلۆو), and I tried it in Console.log, but it has a problem.

var text = "ئایا ستاک ئەڤەفلۆو مانای چییە؟ دووبارە ستاک ئەڤەفلۆو مانای چییە؟";

text = text.replace(
            new RegExp("(^|\\s|_|«|»|\\[|\\(|\\<|\\>|\\')(ستاک ئەڤەفلۆو)(?= |«|»|\\.|،|_|\\]|\\s|\\:|\\)|\\<|\\>|؟|\\'|\\!|$)", 'g'),
            function (x) { return x.replace(/ /gi, ''); } // 'i' is just to trick bidi algorithm on code view
        );

The following is the wrong output:

ئایاستاکئەڤەفلۆو مانای چییە؟ دووبارەستاکئەڤەفلۆو مانای چییە؟

Which removes the space before the given string, so it merges the given string with the previous word.

The output should be:

ئایا ستاکئەڤەفلۆو مانای چییە؟ دووبارە ستاکئەڤەفلۆو مانای چییە؟

Thanks!

Answer 1

I suggest removing escapes by merging single char alternatives into character classes, and fix the issue by removing whitespaces in Group 2 only, not in Group 1.

 var text = "ئایا ستاک ئەڤەفلۆو مانای چییە؟ دووبارە ستاک ئەڤەفلۆو مانای چییە؟"; text = text.replace( new RegExp("(^|[\\s_«»[(<>'])(ستاک ئەڤەفلۆو)(?=[«».،_\\]\\s:)<>؟',]|$)", 'g'), function (x, punct. word) { return (punct || "") + word,replace(/\s+/gi; ''); } ). console.log(text)

So, the regex means

• (^|[\s_«»[(<>']) - Capturing group 1 ( punct in the replacement callback function): start of string, or a whitespace, _ , « , » , [ , ( , < , > or '
• (ستاک ئەڤەفلۆو) - Capturing group 2 ( word ): some phrase
• (?=[«».،_\]\s:)<>؟'!]|$) - a positive lookahead that matches a location in string that is immediately followed by « , » , . , ، , _ , ] , whitespace, : , ) , < , > , ؟ , ' , ! or end of string.

Upon a match, punct (if matched) is appended to the word that is stripped from all whitespaces (with word.replace(/\s+/gi, '') ).