81 lines
2.8 KiB
JavaScript
81 lines
2.8 KiB
JavaScript
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'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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, 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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, defineProperty = Object.defineProperty, getPrototypeOf = Object.getPrototypeOf
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, SetPoly, getValues, NativeSet;
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if (isNative) NativeSet = Set;
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module.exports = SetPoly = function Set(/*iterable*/) {
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var iterable = arguments[0], self;
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if (!(this instanceof SetPoly)) throw new TypeError('Constructor requires \'new\'');
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if (isNative && setPrototypeOf) self = setPrototypeOf(new NativeSet(), getPrototypeOf(this));
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else self = this;
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if (iterable != null) iterator(iterable);
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defineProperty(self, '__setData__', d('c', []));
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if (!iterable) return self;
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forOf(iterable, function (value) {
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if (eIndexOf.call(this, value) !== -1) return;
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this.push(value);
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}, self.__setData__);
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return self;
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};
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if (isNative) {
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if (setPrototypeOf) setPrototypeOf(SetPoly, NativeSet);
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SetPoly.prototype = Object.create(NativeSet.prototype, { constructor: d(SetPoly) });
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}
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ee(Object.defineProperties(SetPoly.prototype, {
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add: d(function (value) {
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if (this.has(value)) return this;
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this.emit('_add', this.__setData__.push(value) - 1, value);
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return this;
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}),
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clear: d(function () {
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if (!this.__setData__.length) return;
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clear.call(this.__setData__);
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this.emit('_clear');
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}),
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delete: d(function (value) {
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var index = eIndexOf.call(this.__setData__, value);
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if (index === -1) return false;
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this.__setData__.splice(index, 1);
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this.emit('_delete', index, value);
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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, value;
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callable(cb);
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iterator = this.values();
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result = iterator._next();
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while (result !== undefined) {
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value = iterator._resolve(result);
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call.call(cb, thisArg, value, value, this);
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result = iterator._next();
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}
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}),
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has: d(function (value) {
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return (eIndexOf.call(this.__setData__, value) !== -1);
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}),
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keys: d(getValues = function () { return this.values(); }),
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size: d.gs(function () { return this.__setData__.length; }),
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values: d(function () { return new Iterator(this); }),
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toString: d(function () { return '[object Set]'; })
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}));
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defineProperty(SetPoly.prototype, Symbol.iterator, d(getValues));
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defineProperty(SetPoly.prototype, Symbol.toStringTag, d('c', 'Set'));
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