如何提取两个字符之间的字符串？

Question

These are my strings:

there_is_a_string_here_1_480@1111111
there_is_a_string_here_1_360@1111111
there_is_a_string_here_1_180@1111111

What I want to do is extracting 180, 360 and 480 from those strings.

I tried this RegEx _(.*)@ but no chance.

Answer 1

You just want the capture group:

 var str = 'there_is_a_string_here_1_180@1111111'; var substr = str.match(/_(\\d*)@/); if (substr) { substr = substr[1]; console.log(substr); } //outputs 180 

Answer 2

you almost got it

_(\d{3})@

you need to do a match on digits, or else the string will also get selected because of the other underscore.

Ofcourse your match will be in \\1

Answer 3

Try this

  var str = "there_is_a_string_here_1_480@1111111"; var matches = str.match(/_\\d+@/).map(function(value){return value.substring(1,value.length-1);}); document.body.innerHTML += JSON.stringify(matches,0,4); 

Answer 4

try this:

(?<= (?!.* ))(.*)(?=@)

Use lookbehind (?<=) and look ahead (?=) so that "_" and "@" are not included in the match.

(?!.* ) gets the last occurence of "_".

(.*) matches everything between the last occurence of "_" and "@".

I hope it helps.