List Length

[Pedlar Decosta]

Hi all, I am getting a strange/unexpected result when calling for a list length in one of my scripts.

Basically I am testing it using -  llOwnerSay("list is "+llList2CSV(accesslist)+" and length is "+(string)llGetListLength(accesslist));

and this is the reply - [19:44] TV - Scripted: list is  and length is 1

so my question is, if it says the list is empty, why is the length saying 1 ?

I thought it was possibly a space but I tested for that with this -

 llOwnerSay("list is this |"+llList2String(accesslist,0)+"|");
 llOwnerSay("2list is this |"+llList2String(accesslist,1)+"|");

and got this -

[20:02] TV - Scripted: list is this ||
[20:02] TV - Scripted: 2list is this ||

All I wanted to do was eliminate the comma after the owner name (not on the list but added first in the feedback) if no one was on the list...

I have other scripts where I have succeeded in changing the output if the answer was singular or multiple, however again... I am trying to identify why there's a problem in the first place.

In case it is relevant, this is how the list is formed -

            string message2 = llToLower(message);
            accesslistfilter3 = [];
            accesslistfilter3 += llCSV2List(message2);
            accesslistfilter2 = ListItemDelete(accesslistfilter3, "ac");
            accesslistfilter = ListXorY(accesslistfilter, accesslistfilter2);
            accesslist = ListXorY(accesslist, accesslistfilter);
            accesslist = ListItemDelete(accesslist, "");

(This is probably ugly coding to you guys, but it seems to work nicely for me).

Edited May 20, 2019 by Pedlar Decosta

[Mollymews]

if you copied this line directly from chat: [19:44] TV - Scripted: list is  and length is 1

then there are 2 spaces between "is" and "and". Which indicates that the list has an empty element in it.  Which makes the length return of 1 from llGetListLength()  accurate

[Rolig Loon]

If you just want to keep from having a comma print out in chat if there's only one element in your list, try

default
{
    touch_start(integer total_number)
    {
        list a = ["My list"];
        llSay(0, llDumpList2String(a,","));
        a += [ " with a comma in the middle"];
        llSay(0, llDumpList2String(a,","));        
    }
}

 

[Pedlar Decosta]

but I added spaces in the feedback to separate the words. Are you sure this is extra after those MollyMews?

i.e  llOwnerSay("list is (space here)"+llList2CSV(accesslist)+" (and here)and length is "+(string)llGetListLength(accesslist));

thanks Rolig, I am always grateful for better ways to write it, but also am curious to why there is a hidden element in the first place.

[Rolig Loon]

Have you looked to see if the first element in the list is some other non-printing character?  Try adding message2 = llEscapeURL(message2); maybe?

[Mollymews]

18 minutes ago, Pedlar Decosta said:

but I added spaces in the feedback to separate the words. Are you sure this is extra after those MollyMews?

sorry, i wasn't clear in my meaning

what Rolig said. For llGetListLength() to return 1 then there is something in the  first list element, either a empty element or a non-printable character

[Pedlar Decosta]

I didn't have any luck with the llEscapeURL function. But it stands to reason you are bothj right. There is a hidden element in the list, so I'll go over it bit by bit and try to get rid of it. Thank you both

 

[Pedlar Decosta]

Ok, I have worked out where the problem was. I could not make the hidden element reveal itself though, but at least I know what caused it. I had this -

string accesslist3;

//and-
        if ( name == "name" )
                    {

                        name = (string)value;
                        accesslist2 += [llToLower(value)];
                        accesslist3 = llList2CSV(accesslist2);
                      }

//and then this -

accesslist = llCSV2List(accesslist3);

So I had incorrectly referred to accesslist3 as a list when it was actually a string.

All I had to do to fix it was parse the string and then the accesslist received the correct info and my list was then empty as it should have been.

I hope this helps someone else with similar problems.