Take a method that depends on "this" and wrap it in a function call you can pass around. Also includes optional currying.

methToFunc.js

Object.defineProperty(Object.prototype, 'methToFunc', {
  value: function(methodName) {
    var method = this[methodName];
    if (typeof method === 'function') {
      var curryArgs = [].slice.call(arguments, 1);
      var that = this;
      return function() {
        return method.apply(that, curryArgs.concat(arguments));
      };
    } else {
      return function() {
        return method;
      };
    }
  }
});