1 var baseKeys = require('./_baseKeys'),
2 getTag = require('./_getTag'),
3 isArguments = require('./isArguments'),
4 isArray = require('./isArray'),
5 isArrayLike = require('./isArrayLike'),
6 isBuffer = require('./isBuffer'),
7 isPrototype = require('./_isPrototype'),
8 isTypedArray = require('./isTypedArray');
10 /** `Object#toString` result references. */
11 var mapTag = '[object Map]',
12 setTag = '[object Set]';
14 /** Used for built-in method references. */
15 var objectProto = Object.prototype;
17 /** Used to check objects for own properties. */
18 var hasOwnProperty = objectProto.hasOwnProperty;
21 * Checks if `value` is an empty object, collection, map, or set.
23 * Objects are considered empty if they have no own enumerable string keyed
26 * Array-like values such as `arguments` objects, arrays, buffers, strings, or
27 * jQuery-like collections are considered empty if they have a `length` of `0`.
28 * Similarly, maps and sets are considered empty if they have a `size` of `0`.
34 * @param {*} value The value to check.
35 * @returns {boolean} Returns `true` if `value` is empty, else `false`.
47 * _.isEmpty([1, 2, 3]);
50 * _.isEmpty({ 'a': 1 });
53 function isEmpty(value) {
57 if (isArrayLike(value) &&
58 (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
59 isBuffer(value) || isTypedArray(value) || isArguments(value))) {
62 var tag = getTag(value);
63 if (tag == mapTag || tag == setTag) {
66 if (isPrototype(value)) {
67 return !baseKeys(value).length;
69 for (var key in value) {
70 if (hasOwnProperty.call(value, key)) {
77 module.exports = isEmpty;