aaac7fed
 liuqimichale
add
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'use strict';
var clear = require('es5-ext/array/#/clear')
, eIndexOf = require('es5-ext/array/#/e-index-of')
, setPrototypeOf = require('es5-ext/object/set-prototype-of')
, callable = require('es5-ext/object/valid-callable')
, validValue = require('es5-ext/object/valid-value')
, d = require('d')
, ee = require('event-emitter')
, Symbol = require('es6-symbol')
, iterator = require('es6-iterator/valid-iterable')
, forOf = require('es6-iterator/for-of')
, Iterator = require('./lib/iterator')
, isNative = require('./is-native-implemented')
, call = Function.prototype.call
, defineProperties = Object.defineProperties, getPrototypeOf = Object.getPrototypeOf
, MapPoly;
module.exports = MapPoly = function (/*iterable*/) {
var iterable = arguments[0], keys, values, self;
if (!(this instanceof MapPoly)) throw new TypeError('Constructor requires \'new\'');
if (isNative && setPrototypeOf && (Map !== MapPoly)) {
self = setPrototypeOf(new Map(), getPrototypeOf(this));
} else {
self = this;
}
if (iterable != null) iterator(iterable);
defineProperties(self, {
__mapKeysData__: d('c', keys = []),
__mapValuesData__: d('c', values = [])
});
if (!iterable) return self;
forOf(iterable, function (value) {
var key = validValue(value)[0];
value = value[1];
if (eIndexOf.call(keys, key) !== -1) return;
keys.push(key);
values.push(value);
}, self);
return self;
};
if (isNative) {
if (setPrototypeOf) setPrototypeOf(MapPoly, Map);
MapPoly.prototype = Object.create(Map.prototype, {
constructor: d(MapPoly)
});
}
ee(defineProperties(MapPoly.prototype, {
clear: d(function () {
if (!this.__mapKeysData__.length) return;
clear.call(this.__mapKeysData__);
clear.call(this.__mapValuesData__);
this.emit('_clear');
}),
delete: d(function (key) {
var index = eIndexOf.call(this.__mapKeysData__, key);
if (index === -1) return false;
this.__mapKeysData__.splice(index, 1);
this.__mapValuesData__.splice(index, 1);
this.emit('_delete', index, key);
return true;
}),
entries: d(function () { return new Iterator(this, 'key+value'); }),
forEach: d(function (cb/*, thisArg*/) {
var thisArg = arguments[1], iterator, result;
callable(cb);
iterator = this.entries();
result = iterator._next();
while (result !== undefined) {
call.call(cb, thisArg, this.__mapValuesData__[result],
this.__mapKeysData__[result], this);
result = iterator._next();
}
}),
get: d(function (key) {
var index = eIndexOf.call(this.__mapKeysData__, key);
if (index === -1) return;
return this.__mapValuesData__[index];
}),
has: d(function (key) {
return (eIndexOf.call(this.__mapKeysData__, key) !== -1);
}),
keys: d(function () { return new Iterator(this, 'key'); }),
set: d(function (key, value) {
var index = eIndexOf.call(this.__mapKeysData__, key), emit;
if (index === -1) {
index = this.__mapKeysData__.push(key) - 1;
emit = true;
}
this.__mapValuesData__[index] = value;
if (emit) this.emit('_add', index, key);
return this;
}),
size: d.gs(function () { return this.__mapKeysData__.length; }),
values: d(function () { return new Iterator(this, 'value'); }),
toString: d(function () { return '[object Map]'; })
}));
Object.defineProperty(MapPoly.prototype, Symbol.iterator, d(function () {
return this.entries();
}));
Object.defineProperty(MapPoly.prototype, Symbol.toStringTag, d('c', 'Map'));
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