attach additional methods to an obj in Javascript.

attach_methods.js

var attachMethods = function(obj,methods) {
  var wrap = function(a,f) {
    return function() { return f.apply(a,arguments); }
  };
  for (var name in methods) {
    if (obj[name]) throw "conflict:"+name;
    obj[name] = wrap(obj,methods[name]);
  }
  return obj;
}

var singleton = function(methods) {
    return attachMethods({],methods);
}

/* Usage:
  var sysObj = some.system.getObj();
  attachMethods(sysObj, {
    myMethod1: function(a,b,c) {
      this.apiFunc(a,b); // this --> sysObj
    },
    myMethod2: function(x,y) {
      ...
    },
    ...
  });
*/