如何在 javascript 中组合 str.replace() 表达式？
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How to combine str.replace() expressions in javascript?
提问by Andy Lobel
I want to combine all them expressions into one and haven't got a clue how to do it, it needs to remove the end white-space and remove the beginning white-space but shorten white-space between two words to only one (if there's more than one). Thanks
我想将所有这些表达式合并为一个，但不知道该怎么做，它需要删除结尾的空格并删除开头的空格，但将两个单词之间的空格缩短为一个（如果不止一个）。谢谢
var _str = document.contact_form.contact_name.value;
name_str = _str.replace(/\s+/g,' ');
str_name = name_str.replace(/\s+$/g,'');
name = str_name.replace(/^\s+/g,'');
document.contact_form.contact_name.value = name;
回答by Mark Byers
回答by John Gathogo
document.contact_form.contact_name.value = _str.replace(/\s+/g,' ')..replace(/\s+$/g,'').replace(/^\s+/g,'');
回答by nnnnnn
var name = _str.replace(/\s+$|^\s+/g,'').replace(/\s+/g,' ');
You can use the |character in your regular expression to match the sub-expression on either side of it, and you can chain multiple calls to .replace().
您可以使用|正则表达式中的字符来匹配其任一侧的子表达式，并且可以将多个调用链接到.replace().
By the way, don't forget to declare all of your variables with var.
顺便说一句，不要忘记用var.
回答by David O'Riva
Looks to me like it's time to define function compactify(str). Even if you could cram all of that into one RegEx, the result would be difficult to read and worse to maintain.
在我看来，是时候定义function compactify(str). 即使您可以将所有这些都塞进一个 RegEx，结果将难以阅读并且更难以维护。
