Get value returned by function called in setTimeout

[ScripterSam]

Hello Freinds,
I have a funtion to call from setTimeout function which will return some value..
I mean I need to get the value, the function called from the setTimeout function returns...
Please help

[rohitchawla]

u can try something like this

function a()
{
var x="45";
return x;
}
var y;
setTimeout(y=a(),1000);
alert(y);
 

[dmjpro]

u can try something like this

function a()
{
var x="45";
return x;
}
var y;
setTimeout(y=a(),1000);
alert(y);
 

It will be ...

setTimeout("y=a()",1000);
 

Debasis Jana

[ScripterSam]

u can try something like this

function a()
{
var x="45";
return x;
}
var y;
setTimeout(y=a(),1000);
alert(y);
 

I tried this out but the alert message is showing undefined for y value...

[gits]

I tried this out but the alert message is showing undefined for y value...

hi ...

of course i comment the code ... have a look at it:

// this function returns '45'
function a() {
    var x = "45";
    return x;
}
// declare global var y
var y;
 
// after 1 second y will be set to '45'
setTimeout('y = a();', 1000);
 
// the alert is called instantly but y is not set yet!
// so you get 'undefined'
alert(y);
 

to fix that you may use:

function a() {
    var x = "45";
    return x;
}
 
var y;
 
function set_y () {
    y = a();
    alert(y);
}
 
setTimeout(set_y, 1000);
 

kind regards

ps: in case you use:

setTimeout(y = a(), 1000);

the timeout is useless ... y is assigned instantly the '45' from function a ... nothing more

[rohitchawla]

well yes but u can assign any function associated with it
it was just an example
and thanks gits for fixing my mistakes
i am also new to js

[gits]

well yes but u can assign any function associated with it
it was just an example
and thanks gits for fixing my mistakes
i am also new to js

heya rohitchawla,

no problem ... let me give a short additional explaination of the setTimeout method:

usage:

window.setTimeout(funcref, milliseconds);

funcref has to be a function-reference you may use the function-name here as in my example or the 'function-signature' enclosed in qoutes as in dmjpros example ... because it needs this reference since the code should be executed in the future ... and therefore has not to be called instantly ...

kind regards

[acoder]

Changed thread title to better describe the problem.