Call javascript functions Dynamically

Question

i am generating dynamic javascript in which i create few functions for storing value

function get[dynamicname](){
 return "some value";
}

i want to call this method in another function to get the values of all functions i created

i have all the dynamicnames which i used to create the functions in the function which i am calling..

function getallfunctionvals(){
 for ( var i = 0; i < array.length; i++ ) {
 var s="get";
 var ss="()";
 console.log(s+array[i]+ss);
 }
}

this is how i am calling the dynamically generated functions but in the console i am getting the function name as string not the value inside it

• Arun P Johny: if the function is in global scope then you can use eval(s+array[i]+ss) - stackoverflow.com/questions/86513/…
• Denys Séguret: But he shouldn't. Use a map of functions, don't define functions in the global scope.
• elclanrs: Agree, window[dynamic] is not a solution, nor is eval. This looks like a common XY problem.
• Vijay Rahul: @dystroy can u tell how to use map of functions

Answer 1

Hi look at This post.

One of the answer:

if you know that its a global function you can use:

var functPtr = window[func_name];
//functPtr()

Otherwise replace window with the parent object containing the function.

Answer 2

if defined function is in gloabal scope, you can use

window[s+array[i]]()

So if you have a function like getName. what it will do it will call something like

window["getName"]();

Answer 3

you can use eval function. Eg.

 var s = eval("function get(){}; gat();");

• Prabhu Murthy: eval function is evil

Answer 4

first of all:

function get[dynamicname](){
return "some value";
}

will generate error: SyntaxError: Unexpected token [

Since "[" is not allowed in javascript function name and variable.

But you can do this:

function getName () {console.log('Name')};
function getAge () {console.log('Age')};

When you invoke the above functions, you can do this:

var s="get";
var thingToGet = "Name";
var ss="()";
eval(s + thingToGet + ss)

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