1  /**
 2   * lodash 3.0.3 (Custom Build) <https://lodash.com/>
 3   * Build: `lodash modularize exports="npm" -o ./`
 4   * Copyright 2012-2016 The Dojo Foundation <http://dojofoundation.org/>
 5   * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
 6   * Copyright 2009-2016 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
 7   * Available under MIT license <https://lodash.com/license>
 8   */
 9  
10  /** `Object#toString` result references. */
11  var numberTag = '[object Number]';
12  
13  /** Used for built-in method references. */
14  var objectProto = Object.prototype;
15  
16  /**
17   * Used to resolve the [`toStringTag`](http://ecma-international.org/ecma-262/6.0/#sec-object.prototype.tostring)
18   * of values.
19   */
20  var objectToString = objectProto.toString;
21  
22  /**
23   * Checks if `value` is object-like. A value is object-like if it's not `null`
24   * and has a `typeof` result of "object".
25   *
26   * @static
27   * @memberOf _
28   * @category Lang
29   * @param {*} value The value to check.
30   * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
31   * @example
32   *
33   * _.isObjectLike({});
34   * // => true
35   *
36   * _.isObjectLike([1, 2, 3]);
37   * // => true
38   *
39   * _.isObjectLike(_.noop);
40   * // => false
41   *
42   * _.isObjectLike(null);
43   * // => false
44   */
45  function isObjectLike(value) {
46    return !!value && typeof value == 'object';
47  }
48  
49  /**
50   * Checks if `value` is classified as a `Number` primitive or object.
51   *
52   * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are classified
53   * as numbers, use the `_.isFinite` method.
54   *
55   * @static
56   * @memberOf _
57   * @category Lang
58   * @param {*} value The value to check.
59   * @returns {boolean} Returns `true` if `value` is correctly classified, else `false`.
60   * @example
61   *
62   * _.isNumber(3);
63   * // => true
64   *
65   * _.isNumber(Number.MIN_VALUE);
66   * // => true
67   *
68   * _.isNumber(Infinity);
69   * // => true
70   *
71   * _.isNumber('3');
72   * // => false
73   */
74  function isNumber(value) {
75    return typeof value == 'number' ||
76      (isObjectLike(value) && objectToString.call(value) == numberTag);
77  }
78  
79  module.exports = isNumber;