javascript regex pattern with an array -

I want to create a regex pattern which should be able to search through an array.

We say:

  var arr = ["first", "second", "third"]; var match = text.match (/ & lt; ara & gt; /);   
 who should only be able to match  
  & lt; First & gt; Or & lt; Seconds & gt; Or & lt; Third & gt; ......   
 but should ignore  
  & lt; ffirst & gt; Or & lt; Dummy & gt;   
 I need an efficient approach.  
 Any help would be great thanks   
 
 
 You  (a | b | c) should search for a particular word .  
 .    has been created from  arr  by joining the values ​​as <
 var arr = ["first", "second", "third"]; var match = text.match (new regxp ("& lt; (?:" + arr.join ("|") + "))");); // mail & lt; First & gt; & Lt; Second & gt; And & lt; Third & gt;   
 Note that if your "source" words contain regular characters of regular expressions - you may have trouble - so you may need to avoid those characters which Before joining  
 A good job can be found to do this:  
  function regexpQuote (str, delimiter) {return string (str). Replace (New RegExp ('[.. \\\\ + * * \\ [\\ ^ \\] $ () {} =!  | |: \\' + (Limiter || '' ) + '-]', 'g'), '\\ $ & amp;'); }   
 So in this case you have  
  function ascenderer (ARR) {var escaped = []; For (arr in var i) {escaped.push (regexpQuote (arr [i])); } The refund survived; } Var arr = ["first", "second", "third"]; var pattern = new regExp ("& lt; (?:" + escape arr .joint ("|") + ") & gt;"); var match = text.match (pattern); // mail & lt; First & gt; & Lt; Second & gt; And & lt; Third & gt;