code: function sameValueZero(a, b) {
      if (isRealNaN(a)) {
        return isRealNaN(b);
      }
      return a === b ? a !== 0 || 1 / a === 1 / b : false;
    }
docs: *
  @module ES7
  @description Polyfills that provide basic ES7 compatibility. This module
  provides the base for Sugar functionality, but is not a full
  polyfill suite.
  
  * * @namespace Array **