1  /** Error message constants. */
 2  var FUNC_ERROR_TEXT = 'Expected a function';
 3  
 4  /**
 5   * Creates a function that negates the result of the predicate `func`. The
 6   * `func` predicate is invoked with the `this` binding and arguments of the
 7   * created function.
 8   *
 9   * @static
10   * @memberOf _
11   * @since 3.0.0
12   * @category Function
13   * @param {Function} predicate The predicate to negate.
14   * @returns {Function} Returns the new negated function.
15   * @example
16   *
17   * function isEven(n) {
18   *   return n % 2 == 0;
19   * }
20   *
21   * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
22   * // => [1, 3, 5]
23   */
24  function negate(predicate) {
25    if (typeof predicate != 'function') {
26      throw new TypeError(FUNC_ERROR_TEXT);
27    }
28    return function() {
29      var args = arguments;
30      switch (args.length) {
31        case 0: return !predicate.call(this);
32        case 1: return !predicate.call(this, args[0]);
33        case 2: return !predicate.call(this, args[0], args[1]);
34        case 3: return !predicate.call(this, args[0], args[1], args[2]);
35      }
36      return !predicate.apply(this, args);
37    };
38  }
39  
40  module.exports = negate;