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Question about formatting a command
Samhain Broom
Registered User
Join date: 1 Aug 2004
Posts: 298
11-01-2004 12:41
Can you expect a command like:

llList2Integer(someList, (x+y%5))

to work in a for loop like:

llList2Integer(someList, 1)
llList2Integer(someList, 2)
llList2Integer(someList, 3)
llList2Integer(someList, 4)

In otherwords, will the (x+y%5) be evaluated or will it just be an error?

I'm guessing that I have to add another value so that I can just put that variable in the equasion:

z=(x+y%5)

then

llList2Integer(someList, z)
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Water Rogers
Registered User
Join date: 1 May 2003
Posts: 286
11-01-2004 13:05
As long as it evaluates to an integer, then you should be fine.

edit: gave this code a whirl in game real quick... dunno if it's exactly what you were talking about... but here's the results:
CODE
list someList = ["1", "2", "3", "4", "5"];
integer x = 1;
integer y = 1;

default
{
    state_entry()
    {
        integer someInteger = llList2Integer(someList, (x+y%5));
        llSay(0, "someList = " + llList2CSV(someList));
        llSay(0, "someInteger = " + (string)someInteger);
    }
}

////////////////////////////////////////////////////////
//                        Outputs                            
////////////////////////////////////////////////////////

Object: someList = 1, 2, 3, 4, 5
Object: someInteger = 3
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Wednesday Grimm
Ex Libris
Join date: 9 Jan 2003
Posts: 934
11-01-2004 13:36
yes, even something zany like
llList2String(lMyList, llList2Integer(lMyList, x*2));
would work.

Variable are ALWAYS(*) interperted when they're used, and arguments to a function are interpreted (resolved, finalized, calculated, whatevered) just before the function is called.

(*) almost always, probably, the LSL compiler might do some optimizations, but in any case, it's safe to assume always.
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Samhain Broom
Registered User
Join date: 1 Aug 2004
Posts: 298
11-03-2004 08:30
That helps a LOT Wednesday!

I wanted to have a list of integers something like:

myList=[1143, 2143, 3143, 4143]

I want to randomly select an integer from this list (let's say for example the second item in the list) Then do a "for loop" that always does 4 iterations. So, if I start with 1, I want the for loop to count thus:
1,2,3,0

then stop. If it starts on the 3rd, it should count:
2,3,0,1

and so on.

Assuming that

integer x;
integer y;
integer z;

is done somewhere and I call a function with a random value "y"

so if I do:

CODE
for (x=0; x>3;x++)
{
      z=llList2Integer(myList, (x+y%5));
      //do something with "z"
}


Now, when I start this loop, depending on what y equals, I will achieve the above sequences, and z will be the integers from the list right?
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Wednesday Grimm
Ex Libris
Join date: 9 Jan 2003
Posts: 934
11-03-2004 11:02
From: Samhain Broom
CODE
for (x=0; x>3;x++)
{
      z=llList2Integer(myList, (x+y%5));
      //do something with "z"
}

The concept is correct, but you probably want:
CODE

      z=llList2Integer(myList, ((x+y)%4));  // extra brackets and 4 instead of 5

4 not 5 because 4%4 = 0
extra brackets because % is "stronger" than + (I think) so without brackets you would get y%4 + x
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Samhain Broom
Registered User
Join date: 1 Aug 2004
Posts: 298
11-03-2004 13:15
I also noticed I need to change the for loop math there...

it should say
CODE

for (x=0; x<3; x++)
{
      bla
}
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Samhain Broom
Registered User
Join date: 1 Aug 2004
Posts: 298
11-04-2004 18:24
ok for proof of concept... here was the final test that I used to prove that the snippet worked. I am providing this for discussion in case someone learning wants to know more. Thanks Wednesday for the assistance.

CODE

retest()
{
	float x = llFrand(3 - 0) + 0;
	integer y = (integer)x;
	list playerList=[1143, 2143, 3143, 4143]; //a list of integers
	llWhisper(0, "x = " +(string)x);
	llWhisper(0, "y = " +(string)y);
	integer i;
	for (i = 0; i <4; i++)
	{
		integer cardID = llList2Integer(playerList, ((i+y)%4));
		llWhisper(0, "cardID = " +(string)cardID);
	}        
}

default
{
    state_entry()
    {
		llWhisper(0, "Touch to restart");
    }

    touch_start(integer total_number)
    {
        retest();
    }
}


I provided some extra 'llWhispers()' as test points to see what the values were... I will clean those up in the real script. The following is an example output:

CODE

Object whispers: x = 1.017203
Object whispers: y = 1
Object whispers: cardID = 2143
Object whispers: cardID = 3143
Object whispers: cardID = 4143
Object whispers: cardID = 1143


so the floating point "x" was equal to 1 (something) then cleaned up into an integer into "y" for later use in the "for loop" I was sucessful in printing my list of integers. Yeah!

Thanks again!
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