| 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;
 |