vue hello world项目
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3 years ago
var wellKnownSymbol = require('../internals/well-known-symbol');
var Iterators = require('../internals/iterators');
var ITERATOR = wellKnownSymbol('iterator');
var ArrayPrototype = Array.prototype;
// check on default Array iterator
module.exports = function (it) {
return it !== undefined && (Iterators.Array === it || ArrayPrototype[ITERATOR] === it);
};