Delete Single Variable from List

[brianism]

Is this possible? I am trying to work on code I did not create and add a "remove" button for each of the items in a cart.  The cart items are being passed as a list and then being looped over to display the contents of the cart in a form.  Here is what I am working with:

<!---this is what happens when an item is added to the cart--->

<cfif isDefined("session.ezform") and session.ezform neq "">
    <cfif not ListFind(session.ezform,url.id)>
        <cfset session.ezform = ListAppend(session.ezform,url.id)>
    </cfif>
<cfelse>
    <cfif isDefined("url.id") and url.id neq "">
        <cfset session.ezform = "#url.id#">
    </cfif>
</cfif>

<!--I don't know what to put here once the remove button is clicked that will delete from the list where litm is equal to the list variable--->

<cfif IsDefined ("deleteprod")>

</cfif>

<!---the remove button link--->

<a href="ezform.cfm?deleteprod&litm=#litm#">Remove from Cart</a>

[existdissolve · Accepted solution]

Have you looked at ColdFusion's handy ListDeleteAt() function?

http://livedocs.adobe.com/coldfusion/8/htmldocs/functions_l_08.html#130600

Used in conjuction with ListFindNoCase(), you can make short work of this:

<cfif isdefined("deleteprod")>

     <!---Get position of listitem; returns 0 if no item is found--->

     <cfset listpos = listfindnocase(mylist,url.litm)>

     <cfif listpos neq 0>

          <!---If listpos is not 0, we have a match; use listpost as the "position" of the item in the list we want to delete--->

          <cfset newlist = listdeleteat(oldlist,listpos)>

     </cfif>

</cfif>

I haven't tested this, but it's probably on the right track.

[brianism]

Awesome! That worked exactly how I needed it to!  I did read up a bit about ListDeleteAt() but I didn't really understand it.  Thank you for doing that so I could read through it and understand how it works.

[existdissolve]

Sure thing--glad it worked out.