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x/lodash/npm-package/toNumber.js

A modern JavaScript utility library delivering modularity, performance, & extras.
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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;