105 lines
3.4 KiB
JavaScript
105 lines
3.4 KiB
JavaScript
'use strict';
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var clear = require('es5-ext/array/#/clear')
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, eIndexOf = require('es5-ext/array/#/e-index-of')
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, setPrototypeOf = require('es5-ext/object/set-prototype-of')
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, callable = require('es5-ext/object/valid-callable')
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, validValue = require('es5-ext/object/valid-value')
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, d = require('d')
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, ee = require('event-emitter')
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, Symbol = require('es6-symbol')
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, iterator = require('es6-iterator/valid-iterable')
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, forOf = require('es6-iterator/for-of')
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, Iterator = require('./lib/iterator')
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, isNative = require('./is-native-implemented')
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, call = Function.prototype.call
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, defineProperties = Object.defineProperties, getPrototypeOf = Object.getPrototypeOf
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, MapPoly;
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module.exports = MapPoly = function (/*iterable*/) {
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var iterable = arguments[0], keys, values, self;
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if (!(this instanceof MapPoly)) throw new TypeError('Constructor requires \'new\'');
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if (isNative && setPrototypeOf && (Map !== MapPoly)) {
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self = setPrototypeOf(new Map(), getPrototypeOf(this));
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} else {
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self = this;
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}
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if (iterable != null) iterator(iterable);
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defineProperties(self, {
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__mapKeysData__: d('c', keys = []),
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__mapValuesData__: d('c', values = [])
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});
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if (!iterable) return self;
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forOf(iterable, function (value) {
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var key = validValue(value)[0];
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value = value[1];
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if (eIndexOf.call(keys, key) !== -1) return;
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keys.push(key);
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values.push(value);
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}, self);
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return self;
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};
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if (isNative) {
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if (setPrototypeOf) setPrototypeOf(MapPoly, Map);
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MapPoly.prototype = Object.create(Map.prototype, {
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constructor: d(MapPoly)
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});
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}
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ee(defineProperties(MapPoly.prototype, {
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clear: d(function () {
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if (!this.__mapKeysData__.length) return;
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clear.call(this.__mapKeysData__);
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clear.call(this.__mapValuesData__);
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this.emit('_clear');
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}),
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delete: d(function (key) {
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var index = eIndexOf.call(this.__mapKeysData__, key);
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if (index === -1) return false;
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this.__mapKeysData__.splice(index, 1);
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this.__mapValuesData__.splice(index, 1);
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this.emit('_delete', index, key);
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return true;
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}),
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entries: d(function () { return new Iterator(this, 'key+value'); }),
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forEach: d(function (cb/*, thisArg*/) {
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var thisArg = arguments[1], iterator, result;
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callable(cb);
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iterator = this.entries();
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result = iterator._next();
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while (result !== undefined) {
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call.call(cb, thisArg, this.__mapValuesData__[result],
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this.__mapKeysData__[result], this);
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result = iterator._next();
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}
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}),
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get: d(function (key) {
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var index = eIndexOf.call(this.__mapKeysData__, key);
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if (index === -1) return;
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return this.__mapValuesData__[index];
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}),
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has: d(function (key) {
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return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
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}),
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keys: d(function () { return new Iterator(this, 'key'); }),
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set: d(function (key, value) {
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var index = eIndexOf.call(this.__mapKeysData__, key), emit;
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if (index === -1) {
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index = this.__mapKeysData__.push(key) - 1;
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emit = true;
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}
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this.__mapValuesData__[index] = value;
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if (emit) this.emit('_add', index, key);
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return this;
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}),
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size: d.gs(function () { return this.__mapKeysData__.length; }),
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values: d(function () { return new Iterator(this, 'value'); }),
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toString: d(function () { return '[object Map]'; })
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}));
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Object.defineProperty(MapPoly.prototype, Symbol.iterator, d(function () {
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return this.entries();
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}));
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Object.defineProperty(MapPoly.prototype, Symbol.toStringTag, d('c', 'Map'));
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