aaac7fed
 liuqimichale
add
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"use strict";
module.exports = function () {
var arr = [1, "foo"], iterator, result;
if (typeof arr.keys !== "function") return false;
iterator = arr.keys();
if (!iterator) return false;
if (typeof iterator.next !== "function") return false;
result = iterator.next();
if (!result) return false;
if (result.value !== 0) return false;
if (result.done !== false) return false;
return true;
};
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