function inherit(p){  if(p==null){    throw TypeError();  }  if(Object.create){    return Object.create(p);  }  var t=typeof p;  if(t!==‘object‘&&t!==‘function‘){    throw TypeError();  }  function f(){};  f.prototype=p;  return new f();}function range(from,to){  var r=inherit(range.methods);  r.from=from;  r.to=to;  return r;}range.methods={  includes:function(x){    return this.from<=x&&x<=this.to;  },  foreach:function(f){    for(var x=Math.ceil(this.from);x<=this.to;x++) f(x);  },  toString:function(){    return "("+this.from+‘...‘+this.to+‘)‘;  }};var r=range(1,3);r.includes(2);r.foreach(console.log);r.toString();

Object.create(prototype, descriptors)