2 * Checks if `value` is suitable for use as unique object key.
5 * @param {*} value The value to check.
6 * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
8 function isKeyable(value) {
9 var type = typeof value;
10 return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
11 ? (value !== '__proto__')
15 module.exports = isKeyable;