Function callback

lib/web/jshint.js:12496–12501

* Creates a function that invokes `func` with the `this` binding of `thisArg` * and arguments of the created function. If `func` is a property name the * created callback returns the property value for a given element. If `func` * is an object the created callback returns `true` for e

(func, thisArg, guard)

     * // => [{ 'user': 'fred', 'age': 40 }]
     */
    function callback(func, thisArg, guard) {
      if (guard && isIterateeCall(func, thisArg, guard)) {
        thisArg = null;
      }
      return baseCallback(func, thisArg);
    }

    /**
     * Creates a function that returns `value`.