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May 30th, 2015
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  1. yearsBetween = function(d1, d2, roundUp) {
  2. // dates parsing by sugarjs
  3. var d1 = Date.create(d1);
  4. var d2 = Date.create(d2);
  5.  
  6. var range = d2.getFullYear() - d1.getFullYear();
  7. if (d2.setFullYear(1972) < d1.setFullYear(1972)) range--;
  8.  
  9. if (roundUp && d2.getTime() !== d1.getTime()) range++;
  10. return range;
  11. };
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