1  var root = require('./_root'),
 2      toString = require('./toString');
 3  
 4  /** Used to match leading whitespace. */
 5  var reTrimStart = /^\s+/;
 6  
 7  /* Built-in method references for those with the same name as other `lodash` methods. */
 8  var nativeParseInt = root.parseInt;
 9  
10  /**
11   * Converts `string` to an integer of the specified radix. If `radix` is
12   * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
13   * hexadecimal, in which case a `radix` of `16` is used.
14   *
15   * **Note:** This method aligns with the
16   * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
17   *
18   * @static
19   * @memberOf _
20   * @since 1.1.0
21   * @category String
22   * @param {string} string The string to convert.
23   * @param {number} [radix=10] The radix to interpret `value` by.
24   * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
25   * @returns {number} Returns the converted integer.
26   * @example
27   *
28   * _.parseInt('08');
29   * // => 8
30   *
31   * _.map(['6', '08', '10'], _.parseInt);
32   * // => [6, 8, 10]
33   */
34  function parseInt(string, radix, guard) {
35    if (guard || radix == null) {
36      radix = 0;
37    } else if (radix) {
38      radix = +radix;
39    }
40    return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
41  }
42  
43  module.exports = parseInt;