adding element in array when array is empty in Javascript is not working

Question

I am facing a problem in javascript array...i am using Serversent event in JS. I will be getting few values from server frequently...

My task is to catch all the details and display in drop-down box...

Now the problem is, during the first request, i will getting values seperated by comma.. I have array object in js...i will check if the array is empty, if so, then i will include the values in combo...

code:

var varArr = new Array();


//since i am using SSE, i will executing this below part multiple times automaticall when ever server pushes data..

if(!varArr.length){
varArr[0]='somevalue';
//Printing some value in <div>
}
else{
//some task...to print in <div>
}

Since i have added some values in array if the array is empty, i am not getting any values printed in div (//Printing some value in ), instead i am getting (//some task...to print in )

I don't know if it matters because you didn't provide much code, but arrays start at 0 not 1 — Zach Saucier
– Zach Saucier, Commented Sep 12, 2013 at 16:04
i have updated the question at the end...Please help on this — Vignesh
– Vignesh, Commented Sep 12, 2013 at 16:08
using jquery to print some value in div. my condition if(!varArr.length) -> returns true if array is empty..and as I enter the condition, i add value in array...But problem is if I dont add any element in array inside the condition, it prints the value in div...Now my code automatically moves to else part — Vignesh
– Vignesh, Commented Sep 12, 2013 at 16:14
computers start a zero, not one, but that's probably not the issue... — dandavis
– dandavis, Commented Sep 12, 2013 at 16:14
updated the post...corrected the index...but problem persists... — Vignesh
– Vignesh, Commented Sep 12, 2013 at 16:21

Andy · Accepted Answer · 2013-09-12 16:15:58Z

6

Perhaps you mean to do this?

var varArr = new Array();
if (varArr.length === 0) {
  varArr.push(somevalue);
  // Printing some value in <div>
} else {
  // Some task...to print in <div>
}

answered Sep 12, 2013 at 16:15

Andy

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1 Comment

Vignesh Over a year ago

Yes, mistake in my post varArr[0]='somevalue';..but the problem persists in all case...

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