正则表达式，用于允许使用非ASCII字符的（类似twitter的）主题标签

Question

I want a regex to match a simple hashtag like that in twitter (eg #someword). I want it also to recognize non standard characters (like those in Spanish, Hebrew or Chinese).

This was my initial regex: (^|\\s|\\b)(#(\\w+))\\b
--> but it doesn't recognize non standard characters.
Then, I tried using XRegExp.js , which worked, but ran too slowly.

Any suggestions for how to do it?

Answer 1

最终，我发现了这一点： twitter-text.js有用的链接，基本上是twitter解决此问题的方式。

Answer 2

With native JS regexes that don't support unicode, your only option is to explicitly enumerate characters that can end the tag and match everything else, for example:

> s = "foo #הַתִּקְוָה. bar"
"foo #הַתִּקְוָה. bar"
> s.match(/#(.+?)(?=[\s.,:,]|$)/)
["#הַתִּקְוָה", "הַתִּקְוָה"]

The [\\s.,:,] should include spaces, punctuation and whatever else can be considered a terminating symbol.

Answer 3

#([^#]+)[\\s,;]*

Explanation: This regular expression will search for a # followed by one or more non- # characters, followed by 0 or more spaces, commas or semicolons.

var input = "#hasta #mañana #babהַ";
var matches = input.match(/#([^#]+)[\s,;]*/g);

Result:

["#hasta ", "#mañana ", "#babהַ"]

EDIT - Replaced \\b for word boundary