Difference between revisions of "Category:LSL Negative Index"

Negative indexes count backwards from the end.

For string s = "Hello World"

• Index 0 is 'H' (llGetSubString(s,0,0))
• Index -1 is 'd' (llGetSubString(s,-1,-1))
• Index -5 is 'W' (llGetSubString(s,-5,-5))

Care must be taken when using the results of llListFindList and llSubStringIndex in combination with the functions in this category. Those functions will return an index of -1 to indicate 'not found', which if used in these functions is a valid index - but probably not the one you want.

string s = "Hello World";

integer index = llSubstringIndex(s, "t");//index == -1
if(~index)//same as doing (index != -1) but a bit faster, '~' inverts the bits (-1 == all on) so (~-1 == all off)
{
    s = llDeleteSubString(s, index, index);
}