Function assignWith

lib/web/jshint.js:3117–3135

* A specialized version of `_.assign` for customizing assigned values without * support for argument juggling, multiple sources, and `this` binding `customizer` * functions. * * @private * @param {Object} object The destination object. * @param {Object} source The sourc

(object, source, customizer)

     * @returns {Object} Returns `object`.
     */
    function assignWith(object, source, customizer) {
      var props = keys(source);
      push.apply(props, getSymbols(source));

      var index = -1,
          length = props.length;

      while (++index < length) {
        var key = props[index],
            value = object[key],
            result = customizer(value, source[key], key, object, source);

        if ((result === result ? (result !== value) : (value === value)) ||
            (value === undefined && !(key in object))) {
          object[key] = result;
        }
      }
      return object;
    }

    /**
     * The base implementation of `_.assign` without support for argument juggling,