39 lines
1.3 KiB
JavaScript
39 lines
1.3 KiB
JavaScript
'use strict';
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var setPrototypeOf = require('es5-ext/object/set-prototype-of')
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, d = require('d')
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, Iterator = require('es6-iterator')
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, toStringTagSymbol = require('es6-symbol').toStringTag
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, kinds = require('./iterator-kinds')
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, defineProperties = Object.defineProperties
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, unBind = Iterator.prototype._unBind
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, MapIterator;
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MapIterator = module.exports = function (map, kind) {
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if (!(this instanceof MapIterator)) return new MapIterator(map, kind);
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Iterator.call(this, map.__mapKeysData__, map);
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if (!kind || !kinds[kind]) kind = 'key+value';
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defineProperties(this, {
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__kind__: d('', kind),
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__values__: d('w', map.__mapValuesData__)
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});
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};
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if (setPrototypeOf) setPrototypeOf(MapIterator, Iterator);
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MapIterator.prototype = Object.create(Iterator.prototype, {
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constructor: d(MapIterator),
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_resolve: d(function (i) {
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if (this.__kind__ === 'value') return this.__values__[i];
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if (this.__kind__ === 'key') return this.__list__[i];
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return [this.__list__[i], this.__values__[i]];
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}),
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_unBind: d(function () {
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this.__values__ = null;
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unBind.call(this);
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}),
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toString: d(function () { return '[object Map Iterator]'; })
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});
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Object.defineProperty(MapIterator.prototype, toStringTagSymbol,
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d('c', 'Map Iterator'));
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