1  var baseTrim = require('./_baseTrim'),
 2      isObject = require('./isObject'),
 3      isSymbol = require('./isSymbol');
 4  
 5  /** Used as references for various `Number` constants. */
 6  var NAN = 0 / 0;
 7  
 8  /** Used to detect bad signed hexadecimal string values. */
 9  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
10  
11  /** Used to detect binary string values. */
12  var reIsBinary = /^0b[01]+$/i;
13  
14  /** Used to detect octal string values. */
15  var reIsOctal = /^0o[0-7]+$/i;
16  
17  /** Built-in method references without a dependency on `root`. */
18  var freeParseInt = parseInt;
19  
20  /**
21   * Converts `value` to a number.
22   *
23   * @static
24   * @memberOf _
25   * @since 4.0.0
26   * @category Lang
27   * @param {*} value The value to process.
28   * @returns {number} Returns the number.
29   * @example
30   *
31   * _.toNumber(3.2);
32   * // => 3.2
33   *
34   * _.toNumber(Number.MIN_VALUE);
35   * // => 5e-324
36   *
37   * _.toNumber(Infinity);
38   * // => Infinity
39   *
40   * _.toNumber('3.2');
41   * // => 3.2
42   */
43  function toNumber(value) {
44    if (typeof value == 'number') {
45      return value;
46    }
47    if (isSymbol(value)) {
48      return NAN;
49    }
50    if (isObject(value)) {
51      var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
52      value = isObject(other) ? (other + '') : other;
53    }
54    if (typeof value != 'string') {
55      return value === 0 ? value : +value;
56    }
57    value = baseTrim(value);
58    var isBinary = reIsBinary.test(value);
59    return (isBinary || reIsOctal.test(value))
60      ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
61      : (reIsBadHex.test(value) ? NAN : +value);
62  }
63  
64  module.exports = toNumber;