Identifying a line of script

[Softie2k]

var pick1 = parseInt(document.myForm.******.selectedIndex)==null?1arseInt(document.myForm.*****.selectedIndex);

Could someone please help me by explaining how this line in a script works?

Basically I have 2 lists that will be added together like dates.

January in one list and 3rd in another form = January 3rd.

Thanks!

[Nile]

I think that this is an if statement, a short one:

var * = ((condition) ? if its true : otherwise);

I suggest making that line of code into this:

var pick1 = ((parseInt(document.myForm.******.selectedIndex)==null)? 1 : parseInt(document.myForm.*****.selectedIndex));

Well, thats what I've been told.
Hope this Helps,
Nile

[Softie2k]

thanks very much!

[rangana]

var pick1 = parseInt(document.myForm.******.selectedIndex)==null?1arseInt(document.myForm.*****.selectedIndex);
Thanks!

This is a ternary operation..a shorthand of the if statement

Which means exactly the same as:

if (parseInt(document.myForm.******.selectedIndex)==null)
{
var pick 1 = 1;
}
else{
pick1 = parseInt(document.myForm.******.selectedIndex);}

[Nile]

He is very well right, except for the fact that he has a space in the first if(){ inbetween his pick and 1.

This is a ternary operation..a shorthand of the if statement

Which means exactly the same as:

if (parseInt(document.myForm.******.selectedIndex)==null)
{
var pick 1 = 1;
}
else{
pick1 = parseInt(document.myForm.******.selectedIndex);}

[rangana]

Yes Nile, you're right...you hit me on my head

[Nile]

Ah, anytime.

[codeexploiter]

Any of the following will make the operation work.

var pick1 = document.myForm.******.selectedIndex == null ? 1 : document.myForm.*****.selectedIndex;

var pick1 = (document.myForm.******.selectedIndex == null) ? 1 : document.myForm.*****.selectedIndex;

It is not necessary to use parseInt as the selectedIndex used to return an index of the type number.

[Nile]

Codeexploiter, you can also put the whole thing in a ( ), like this:

var pick1 = ((document.myForm.******.selectedIndex == null) ? 1 : document.myForm.*****.selectedIndex);

[codeexploiter]

Yes of course but personally I feel that it is necessary especially if we are constructing a really complex operation using ternary operator. The one discussing here is a single operation equivalent to a simple if else condition.