list llListSort(list src, integer stride, integer ascending)
Sorts
src into blocks of
stride, in ascending order if
ascending is
TRUE, descending order if
ascending is
FALSE, and returns a new list.
src is not changed. If
ascending is not equal to
TRUE then it is considered
FALSE (not typical in LSL).
Note that
llListSort only works between items of the same
type.
Setting
stride to either 0 or 1 sorts each item in the list. For any other number, if the length of
src is not a multiple of
stride this function will silently fail.
Strides
"strides" are groups of related data. For example, if you are storing information about vegetables, and you want to store the vegetable name, its color, and how many of them you have, you might have a list like this:
list vegetables = ["lettuce", "green", 20, "carrots", "orange", 11, "onions", "yellow", 0];
The stride for this list is 3, because there are 3 pieces of data in a block.
llListSort sorts on the first bit of data in each block, in this case, the vegetable name. This command:
...returns this list:
["carrots", "orange", 11, "lettuce", "green", 20, "onions", "yellow", 0]
,
"lettuce" and
"onions" are now sorted into alphabetical order.
If data types do not match,
llListSort still returns a modified list, but the results are strange. Note that while the above example uses a list containing both strings and integers, because the
stride is set to 3,
llListSort only sorts the list according to the string containing the
name of the vegetable.
I've been doing a bit of research into this function and here is how it sorts mixed lists. It sorts the list by each type, then it recombines the sorted result by type, so if the first position was a key, then in the output the first position is a key. So...
llListSort([3, "a",1,"c", 2, "b"], 1, TRUE) --> [1, "a", 2, "b", 3, "c"]
Ans: This example is using a stride of 1: use a stride of 2 and it will sort the list in a useful way.
Using a stride of 2 in the example above, the result would be:--
KW
llListsort([3, "a", 1, "c", 2, "b"], 2, TRUE) --> [1, "c", 2, "b", 3, "a"]
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