polygerrit-ui/app/behaviors/gr-patch-set-behavior/gr-patch-set-behavior.html

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<script>
(function(window) {
  'use strict';

  /** @polymerBehavior Gerrit.PatchSetBehavior */
  var PatchSetBehavior = {
    /**
     * Given an object of revisions, get a particular revision based on patch
     * num.
     *
     * @param {Object} revisions The object of revisions given by the API
     * @param {number|string} patchNum The number index of the revision
     * @return {Object} The correspondent revision obj from {revisions}
     */
    getRevisionByPatchNum: function(revisions, patchNum) {
      patchNum = parseInt(patchNum, 10);
      for (var rev in revisions) {
        if (revisions.hasOwnProperty(rev) &&
            revisions[rev]._number === patchNum) {
          return revisions[rev];
        }
      }
    },
  };

  window.Gerrit = window.Gerrit || {};
  window.Gerrit.PatchSetBehavior = PatchSetBehavior;
})(window);
</script>