List table manipulation

Hi,

I would like to do the following but cannot figure out how:

I have a table in a list. The table would be like this:

name, time1, time2
name, time1, time2
name, time1, time2
name, time1, time2
name, time1, time2
name, time1, time2

What I need to know is how to read any cell in the table, or write to any cell in the table just like you can with an array.

If anyone can help me out with this, thanks in advance.

Hi Debra, the simplest method would be to use 3 lists, one for the names one for time1 and the last for time2.

But you can also use just one list and use something like this:

list mylist ;
float time1 ;
float time2 ;
string name ;
integer LIST_WIDTH = 3 ; // 3 elements per row : name, time1 and time2


getRow(integer num_row)
{
    integer n = num_row * LIST_WIDTH ;
    if (n < (llGetListLength(mylist) - LIST_WIDTH+1))
    {
        name = llList2String(mylist, n) ;
        time1 = llList2Float(mylist, n+1) ;
        time2 = llList2Float(mylist, n+2) ;
    }
    else
        llOwnerSay("Error: list doesn't contain that many elements") ;

}

setRow(integer num_row, string n, float t1, float t2)
{
    if (llGetListLength(mylist) < (num_row * LIST_WIDTH))
    {
        // We could give an error here or expand the list: let's expand it
        integer diff = (llGetListLength(mylist) - (num_row * LIST_WIDTH)) / LIST_WIDTH ;
        integer i ;
        for (i=0;  i< diff; i++)
        {
            if (i == (diff-1))
            {
                mylist += n ; 
                mylist+= t1 ; 
                mylist += t2 ;                 
            }
            else
            {
                mylist += "" ; // empty string
                mylist += 0.0 ; 
                mylist += 0.0 ; 
            }
        }
    }
    else
    {
        mylist = llListReplaceList(mylist, [ n, t1, t2], num_row*LIST_WIDTH, num_row*(LIST_WIDTH+1)-1) ;
    }
}
default
{
    state_entry()
    {
        integer i ;

        // Initialize the list        
        for (i=0; i < 3; i++)
        {
            time1 = llGetTime() ;
            time2 = time1 + 10;
            name = "name " + (string)i ;
            mylist += [name, time1, time2] ;
        }
    }

    touch_start(integer total_number)
    {
        // get second row :
        getRow(1) ; // 0 is first row, 1 second row and so on
        llOwnerSay("name="+name+", time1="+(string)time1+", time2="+(string)time2) ;
        setRow(1, "Hello", 10.0, 55.0) ;
        getRow(1) ; // 0 is first row, 1 second row and so on
        llOwnerSay("name="+name+", time1="+(string)time1+", time2="+(string)time2) ;
                
        
    }
}

Not really tested but that should get you started.

LSL doesn't support arrays, but you can fake them with strided lists. Take a look at http://wiki.secondlife.com/wiki/Category:LSL_List for a good discussion of how it works. In practice, many scripters actually avoid strided lists and simply use sets of indexed lists to do the same thing. You'll find discussions of that approach at the same place on the LSL wiki.

ETA: Ah, and now you have an example, posted as I was typing this post.

The getter was wrong, make sure you test everything before using that...

Ok, thank you. I will go throughout it.