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  1. $.fn.egrep = function(pat) {
  2.  var out = [];
  3.  var textNodes = function(n) {
  4.   if (n.nodeType == Node.TEXT_NODE) {
  5.    var t = typeof pat == 'string' ?
  6.     n.nodeValue.indexOf(pat) != -1 :
  7.     pat.test(n.nodeValue);
  8.    if (t) {
  9.     out.push(n.parentNode);
  10.    }
  11.   }
  12.   else {
  13.    $.each(n.childNodes, function(a, b) {
  14.     textNodes(b);
  15.    });
  16.   }
  17.  };
  18.  this.each(function() {
  19.   textNodes(this);
  20.  });
  21.  return out;
  22. };

URL: http://www.catswhocode.com/blog/10-jquery-snippets-for-efficient-developers

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