HORIZON PROJECT

var isObject = require('./isObject'),

    isSymbol = require('./isSymbol');

/** Used as references for various `Number` constants. */

var NAN = 0 / 0;

/** Used to match leading and trailing whitespace. */

var reTrim = /^\s+|\s+$/g;

/** Used to detect bad signed hexadecimal string values. */

var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;

/** Used to detect binary string values. */

var reIsBinary = /^0b[01]+$/i;

/** Used to detect octal string values. */

var reIsOctal = /^0o[0-7]+$/i;

/** Built-in method references without a dependency on `root`. */

var freeParseInt = parseInt;

/**

 * Converts `value` to a number.

 *

 * @static

 * @memberOf _

 * @since 4.0.0

 * @category Lang

 * @param {*} value The value to process.

 * @returns {number} Returns the number.

 * @example

 *

 * _.toNumber(3.2);

 * // => 3.2

 *

 * _.toNumber(Number.MIN_VALUE);

 * // => 5e-324

 *

 * _.toNumber(Infinity);

 * // => Infinity

 *

 * _.toNumber('3.2');

 * // => 3.2

 */

function toNumber(value) {

  if (typeof value == 'number') {

    return value;

  }

  if (isSymbol(value)) {

    return NAN;

  }

  if (isObject(value)) {

    var other = typeof value.valueOf == 'function' ? value.valueOf() : value;

    value = isObject(other) ? (other + '') : other;

  }

  if (typeof value != 'string') {

    return value === 0 ? value : +value;

  }

  value = value.replace(reTrim, '');

  var isBinary = reIsBinary.test(value);

  return (isBinary || reIsOctal.test(value))

    ? freeParseInt(value.slice(2), isBinary ? 2 : 8)

    : (reIsBadHex.test(value) ? NAN : +value);

}

module.exports = toNumber;