// 22.1.3.31 Array.prototype[@@unscopables] | |
var UNSCOPABLES = require('./_wks')('unscopables'); | |
var ArrayProto = Array.prototype; | |
if (ArrayProto[UNSCOPABLES] == undefined) require('./_hide')(ArrayProto, UNSCOPABLES, {}); | |
module.exports = function (key) { | |
ArrayProto[UNSCOPABLES][key] = true; | |
}; |