module.exports = ProtoList function ProtoList () { this.list = [] } ProtoList.prototype = { get length () { return this.list.length } , get keys () { var k = [] for (var i in this.list[0]) k.push(i) return k } , get snapshot () { var o = {} this.keys.forEach(function (k) { o[k] = this.get(k) }, this) return o } , push : function (obj) { if (typeof obj !== "object") obj = {valueOf:obj} if (this.list.length >= 1) { this.list[this.list.length - 1].__proto__ = obj } obj.__proto__ = Object.prototype return this.list.push(obj) } , pop : function () { if (this.list.length >= 2) { this.list[this.list.length - 2].__proto__ = Object.prototype } return this.list.pop() } , unshift : function (obj) { obj.__proto__ = this.list[0] || Object.prototype return this.list.unshift(obj) } , shift : function () { if (this.list.length >= 1) { this.list[0].__proto__ = Object.prototype } return this.list.shift() } , get : function (key) { return this.list[0][key] } , set : function (key, val, save) { if (!this.length) this.push({}) if (save && this.list[0].hasOwnProperty(key)) this.push({}) return this.list[0][key] = val } , forEach : function (fn, thisp) { for (var key in this.list[0]) fn.call(thisp, key, this.list[0][key]) } , slice : function () { return this.list.slice.apply(this.list, arguments) } , splice : function () { return this.list.splice.apply(this.list, arguments) } } if (module === require.main) { var tap = require("tap") , test = tap.test tap.plan(1) tap.test("protoList tests", function (t) { var p = new ProtoList p.push({foo:"bar"}) p.push({}) p.set("foo", "baz") t.equal(p.get("foo"), "baz") var p = new ProtoList p.push({foo:"bar"}) p.set("foo", "baz") t.equal(p.get("foo"), "baz") t.equal(p.length, 1) p.pop() t.equal(p.length, 0) p.set("foo", "asdf") t.equal(p.length, 1) t.equal(p.get("foo"), "asdf") p.push({bar:"baz"}) t.equal(p.length, 2) t.equal(p.get("foo"), "asdf") p.shift() t.equal(p.length, 1) t.equal(p.get("foo"), undefined) t.end() }) }