| Yang Guo | 4fd355c | 2019-09-19 08:59:03 | [diff] [blame] | 1 | var baseGetTag = require('./_baseGetTag'), |
| 2 | isObjectLike = require('./isObjectLike'); |
| 3 | |
| 4 | /** `Object#toString` result references. */ |
| 5 | var symbolTag = '[object Symbol]'; |
| 6 | |
| 7 | /** |
| 8 | * Checks if `value` is classified as a `Symbol` primitive or object. |
| 9 | * |
| 10 | * @static |
| 11 | * @memberOf _ |
| 12 | * @since 4.0.0 |
| 13 | * @category Lang |
| 14 | * @param {*} value The value to check. |
| 15 | * @returns {boolean} Returns `true` if `value` is a symbol, else `false`. |
| 16 | * @example |
| 17 | * |
| 18 | * _.isSymbol(Symbol.iterator); |
| 19 | * // => true |
| 20 | * |
| 21 | * _.isSymbol('abc'); |
| 22 | * // => false |
| 23 | */ |
| 24 | function isSymbol(value) { |
| 25 | return typeof value == 'symbol' || |
| 26 | (isObjectLike(value) && baseGetTag(value) == symbolTag); |
| 27 | } |
| 28 | |
| 29 | module.exports = isSymbol; |
