In the javascript, how to invoke a method based on method name ?

[Edward Chen]

In the javascript, how to invoke a method based on method name, like

function f(methodName){
   invokeMethod(methodName); // ?
}

Thanks.

[Eric Pascarello]

window[methodName]()

Eric

[Bear Bibeault]

I assume you meant function, not method. (a function assigned as a property of an object is a "method")

[Edward Chen]

Bear Bibeault wrote:I assume you meant function, not method. (a function assigned as a property of an object is a "method")

sometimes I am confusing. let me make it clear

function f(methodName, arg){
   invokeMethod(methodName);
}

function anotherMethod(arg){
  alert(arg);
}

// call
f('anotherMethod', 'name');

How to achieve this ? My goal is to refactor coding and remove the duplication.

Thanks.

[Eric Pascarello]

Something like this should work.

function f(methodName, arg){
    var args = [];
    for(var i=1; i<arguments.length;i++){
      args.push(arguments[i]);
    }
    window[methodName].apply(this,args);
}

function anotherMethod(arg){
  alert(arg);
}

// call
f('anotherMethod', 'name');

I am not sure what this gets you, with JavaScript this may even be a performance hit doing it.

Eric
>

[Bear Bibeault]

Eric already gave you your answer, I was just correcting the terminology.

But, do you really think that approach improves the code in this case? Does it make the code more easily understood?

[Edward Chen]

Bear Bibeault wrote: Does it make the code more easily understood?

No, but I have too many redundant coding. If in the java, we could easily use inheritance to avoid this, but javascript doesn't have OOP.

Thanks for your reply.

[Bear Bibeault]

Which is worse? Some redundant coding? Or code that's obfuscated and hard to understand?

Can you think of more straight-forward ways to make your code better?

Over-complicating code is never the correct path.

[Eric Pascarello]

Sounds like you need to read some books/sites on JavaScript.

Eric