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32 lines
1.2 KiB
32 lines
1.2 KiB
"use strict"; |
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var setPrototypeOf = require("es5-ext/object/set-prototype-of") |
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, contains = require("es5-ext/string/#/contains") |
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, d = require("d") |
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, Symbol = require("es6-symbol") |
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, Iterator = require("./"); |
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var defineProperty = Object.defineProperty, ArrayIterator; |
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ArrayIterator = module.exports = function (arr, kind) { |
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if (!(this instanceof ArrayIterator)) throw new TypeError("Constructor requires 'new'"); |
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Iterator.call(this, arr); |
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if (!kind) kind = "value"; |
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else if (contains.call(kind, "key+value")) kind = "key+value"; |
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else if (contains.call(kind, "key")) kind = "key"; |
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else kind = "value"; |
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defineProperty(this, "__kind__", d("", kind)); |
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}; |
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if (setPrototypeOf) setPrototypeOf(ArrayIterator, Iterator); |
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// Internal %ArrayIteratorPrototype% doesn't expose its constructor |
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delete ArrayIterator.prototype.constructor; |
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ArrayIterator.prototype = Object.create(Iterator.prototype, { |
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_resolve: d(function (i) { |
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if (this.__kind__ === "value") return this.__list__[i]; |
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if (this.__kind__ === "key+value") return [i, this.__list__[i]]; |
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return i; |
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}) |
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}); |
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defineProperty(ArrayIterator.prototype, Symbol.toStringTag, d("c", "Array Iterator"));
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