indexed/lib/asClosure.js

database-like indexed array that always returns a new array

'use strict';

Object.defineProperty(exports, "__esModule", {
	value: true
});
exports.asClosure = asClosure;

var _utils = require('./utils');

var _Indexed = require('./Indexed');

function asClosure(arr, indexes, initializer, factory, receiver) {
	receiver = receiver || Object.create(null);
	var props = (0, _Indexed.Props)(arr, indexes, initializer, factory || asClosure);
	var isArray = Array.isArray(receiver);
	var define = (0, _utils.makeDefine)(receiver);
	define('__indexedProps', props);

	_Indexed.methods.forEach(function (name) {
		var fn = _Indexed.Indexed.prototype[name];
		if (isArray && (fn.nativeArrayMethod || name == 'length')) {
			return;
		}
		define(name, fn);
	});
	if (!isArray) {
		define('length', {
			get: function get() {
				return props.arr.length;
			}
		});
	}
	if ((0, _Indexed.shouldReindex)(props, arr, indexes)) {
		receiver.reindex();
	}

	return receiver;
}