1  var Symbol = require('./_Symbol'),
 2      copyArray = require('./_copyArray'),
 3      getTag = require('./_getTag'),
 4      isArrayLike = require('./isArrayLike'),
 5      isString = require('./isString'),
 6      iteratorToArray = require('./_iteratorToArray'),
 7      mapToArray = require('./_mapToArray'),
 8      setToArray = require('./_setToArray'),
 9      stringToArray = require('./_stringToArray'),
10      values = require('./values');
11  
12  /** `Object#toString` result references. */
13  var mapTag = '[object Map]',
14      setTag = '[object Set]';
15  
16  /** Built-in value references. */
17  var symIterator = Symbol ? Symbol.iterator : undefined;
18  
19  /**
20   * Converts `value` to an array.
21   *
22   * @static
23   * @since 0.1.0
24   * @memberOf _
25   * @category Lang
26   * @param {*} value The value to convert.
27   * @returns {Array} Returns the converted array.
28   * @example
29   *
30   * _.toArray({ 'a': 1, 'b': 2 });
31   * // => [1, 2]
32   *
33   * _.toArray('abc');
34   * // => ['a', 'b', 'c']
35   *
36   * _.toArray(1);
37   * // => []
38   *
39   * _.toArray(null);
40   * // => []
41   */
42  function toArray(value) {
43    if (!value) {
44      return [];
45    }
46    if (isArrayLike(value)) {
47      return isString(value) ? stringToArray(value) : copyArray(value);
48    }
49    if (symIterator && value[symIterator]) {
50      return iteratorToArray(value[symIterator]());
51    }
52    var tag = getTag(value),
53        func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
54  
55    return func(value);
56  }
57  
58  module.exports = toArray;