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Get String between a Prefix String and a Suffix String

/ Published in: JavaScript
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  1. /**
  2.  * Usage  var you = 'hello you guys'.between('hello ',' guys');
  3.  * you = 'you';
  4.  */
  5. String.prototype.between = function(prefix, suffix) {
  6.   s = this;
  7.   var i = s.indexOf(prefix);
  8.   if (i >= 0) {
  9.     s = s.substring(i + prefix.length);
  10.   }
  11.   else {
  12.     return '';
  13.   }
  14.   if (suffix) {
  15.     i = s.indexOf(suffix);
  16.     if (i >= 0) {
  17.       s = s.substring(0, i);
  18.     }
  19.     else {
  20.       return '';
  21.     }
  22.   }
  23.   return s;
  24. }

URL: http://userscripts.org/scripts/review/35396

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