Javascript 正则表达式 /_/g 是什么意思？
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What does the regular expression /_/g mean?
提问by Tom
JavaScript:
JavaScript：
.replace(/_/g," ");
I have it in my code but can't remember why or what it does! Can one of you regular expression gurus help?
我的代码中有它，但不记得为什么或它做什么！你们中的一位正则表达式大师可以帮忙吗？
I know this may seem basic, but regular expressions are not my cup of tea and googling for /gdidn't help much.
我知道这可能看起来很基本，但正则表达式不是我的菜，谷歌搜索/g也没有多大帮助。
回答by SLaks
回答by McKayla
Like everyone else has said, it replaces all underscores with spaces. So "Hello_there."would become "Hello there."
就像其他人所说的那样，它将所有下划线替换为空格。所以"Hello_there."会变成"Hello there."
But along with the answer, I want to suggest something to you. Use comments.
但是，除了答案之外，我还想向您提出一些建议。使用注释。
In your code say something like:
在你的代码中说这样的话：
// Replaces all underscores so that blah blah blah blah blah..
var hello = "Hello_there."
.replace(/_/g, ' ');
回答by Roy Tinker
Returns a new string with all the underscores in the source string replaced with spaces.
返回一个新字符串，源字符串中的所有下划线都替换为空格。
