| Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 1 | var isSymbol = require('./isSymbol'); |
| 2 | |
| 3 | /** Used as references for various `Number` constants. */ |
| 4 | var INFINITY = 1 / 0; |
| 5 | |
| 6 | /** |
| 7 | * Converts `value` to a string key if it's not a string or symbol. |
| 8 | * |
| 9 | * @private |
| 10 | * @param {*} value The value to inspect. |
| 11 | * @returns {string|symbol} Returns the key. |
| 12 | */ |
| 13 | function toKey(value) { |
| 14 | if (typeof value == 'string' || isSymbol(value)) { |
| 15 | return value; |
| 16 | } |
| 17 | var result = (value + ''); |
| 18 | return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result; |
| 19 | } |
| 20 | |
| 21 | module.exports = toKey; |
