Ubersimple prototypal {Io-lang|Lua}-style inheritance in js

var Subj=require("./subject").Subj

define something

var S0=Subj.def({
  name:"Something",
  whoami:function(){
    return this.name}})

instantiate it

var s0=S0.new({
  name:"Something1"})

expect(s0.whoami(),"Something1")

inherit

var S1=S0.def({
  name:"Other",
  whoami:function(){
    return S0.whoami.apply(this,arguments)+" One"}})

instantiate inherited

var s1=S1.new({
  name:"Another"})

expect(s1.whoami(),"Another One")


var S2=S1.def({
  init:function(options){
    options.addname &&
      (this.name+=" "+addname)}})

var s2=S2.new({addname:"No"})

expect(s2.whoami(),"Other No One")