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

if the function is in global scope then you can use `eval(s+array[i]+ss)` - http://stackoverflow.com/questions/86513/why-is-using-the-javascript-eval-function-a-bad-idea — Arun P Johny, Aug 28 '14 at 06:37
But he shouldn't. Use a map of functions, don't define functions in the global scope. — Denys Séguret, Aug 28 '14 at 06:37
Agree, `window[dynamic]` is **not** a solution, nor is `eval`. This looks like a common XY problem. — elclanrs, Aug 28 '14 at 06:40

score 1 · Answer 1 · edited May 23 '17 at 12:21

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.

edited May 23 '17 at 12:21

Community

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answered Aug 28 '14 at 06:39

Orelsanpls

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score 0 · Answer 2 · answered Aug 28 '14 at 06:39

0

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"]();

answered Aug 28 '14 at 06:39

Mritunjay

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score 0 · Answer 3 · answered Aug 28 '14 at 06:40

0

you can use eval function. Eg.

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

answered Aug 28 '14 at 06:40

Vicky

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eval function is evil – Prabhu Murthy Aug 28 '14 at 06:41

score 0 · Answer 4 · answered Aug 28 '14 at 06:46

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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Call javascript functions Dynamically

4 Answers4