dependency injection container

C.js

function Container() { 
  this.s = {};
}

Container.prototype = {
  put: function (i, v, o) {
    return this.s[i] = !o ? v : function (p) {
      return this.c = this.c || v(p);
    };
  },
  get: function (i, p) {
    return typeof this.s[i] === 'function' ?
      this.s[i](p) : this.s[i];
  },
  del: function (i) {
    return delete this.s[i];
  }    
};

var c = new Container ();
c.put("a", function (p) { return p.name; }, true);
c.put("b", function (p) { return p.name; });
alert(c.get("a", { name: 'a1' }));
alert(c.get("a", { name: 'a2' }));
alert(c.get("b", { name: 'b1' }));
alert(c.get("b", { name: 'b2' }));