nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Child Item

Javascript Array

lukin

I have a problem with a javascript array I am using. I am adding it to a combo box but it adds "undefined" to the very end of the array (which then appears at the end of the combo box).
It doesn't appear in the source of the page, I have tried removing it with push() and loads of other ways but nothing works.
Has anyone come across this before?

Find more posts tagged with

Quick Links

Comments

amen

can you post some code?

lukin

amen wrote: »

can you post some code?

I have decided to give up on using an array. I wnat to split a string into substrings based on commas without using an array.

edit; I got it

You can't actually remove it from the array, I had to remove it from the drop down I was adding it to, like so:

if (typeof a1 == 'undefined') {
element.options = null;

amen

I think JavaScript supports split.

look it up

smcelhinney

lukin wrote: »

I have decided to give up on using an array. I wnat to split a string into substrings based on commas without using an array.

edit; I got it

You can't actually remove it from the array, I had to remove it from the drop down I was adding it to, like so:

if (typeof a1 == 'undefined') {
element.options = null;

I would probably worry more about why an "undefined" value is making it into the array in the first place. Trace it back, saves you doing error handling in multiple places.

Also, you can remove items from Javascript arrays using array.splice. Google's your friend on this one.

lukin

smcelhinney wrote: »

I would probably worry more about why an "undefined" value is making it into the array in the first place. Trace it back, saves you doing error handling in multiple places.

I would if I had time. The array is being populated by a javascript responsetext so some weird stuff probably got in there.

smcelhinney wrote: »

Also, you can remove items from Javascript arrays using array.splice. Google's your friend on this one.

I tried spilt(), it worked for separarating out the response text into an array wherever there is a comma but it still put undefined into the end of the array.

amen

if you are getting undefined you have something wrong somewhere.

you need to fix that first