Question

How to solve huge hierarchy in JavaScript function? With Switch? Thank you.

(Sorry, I am not native English speaker.)

function do(param1, param2) {

  switch(param1) {

    case "write":

      /* another switch for param2 */

    break;

    ...

  }

}

Example calls:

do('write','house'); // write house
do('return','house'); // return house 
etc.

Answer 1

Create an object that names functions the way you want:

var obj = {
    "write": function(param) {
        //Write param
    },
    "return": function(param) { //Enclosing the function name is quotes lets you use reserved words as function names
        //Return param
    }
};

You could write your function to simply look up the members in that object using array notation:

function do(param1, param2) {
    obj[param1](param2);
}

Doing it this way would be much easier to maintain and would be much more scalable. However, I wouldn’t even do it that way. I’d replace the do function with the object itself and then you could simply call these members the old fashioned way:

obj.write("Something");

Or, if the name return causes problems and you really want to use it:

obj["return"]("Something");

There’s alot of power and flexibility in JavaScript objects and functions.