| var isSymbol = require('./isSymbol'); | |
| /** Used as references for various `Number` constants. */ | |
| var INFINITY = 1 / 0; | |
| /** | |
| * Converts `value` to a string key if it's not a string or symbol. | |
| * | |
| * @private | |
| * @param {*} value The value to inspect. | |
| * @returns {string|symbol} Returns the key. | |
| */ | |
| function toKey(value) { | |
| if (typeof value == 'string' || isSymbol(value)) { | |
| return value; | |
| } | |
| var result = (value + ''); | |
| return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; | |
| } | |
| module.exports = toKey; |