I searched in the Zig documentation and found that Zig has several ways to sort things e.g. std.sort and std.mem.sort and others. I need to order an arrayList but don't know how to realise it. Any help is welcome.
#Order arrayList?
tired sparrow
limpid bane
use one of those functions on ArrayList.items
tired sparrow
Could you give an example with std.sort.desc() on someArray.items? Thanks so much in advance!
limpid bane
oh yeah thatd just be std.mem.sort(T, someArray.items, {}, std.sort.desc(T)); where T is your element type, {} is just an instance of void because the function returned by std.sort.desc takes void as it's context
tired sparrow
This was really helpful! I missed the void type {}.
limpid bane
np, {} actually just happens to evaluate to void because it's an empty block, but you can also do void{}
tired sparrow
Just one last questions, I can't slice the result with something like orderdArraylist[0..2]: error: slice of non-array type 'void'. Is there a way to extract specific slices, or do I need to convert the ordered arrayList?
limpid bane
<https://github.com/ziglang/zig/issues/15213> :p
oh :,) i did think it was nice to be explicit sometimes, maybe we should make no one happy and do () 👹
limpid bane
Just one last questions, I can't slice the result with something like `orderdArr...
it orders it in place, std.mem.sort doesnt return anything
tired sparrow
it orders it in place, std.mem.sort doesnt return anything
Is there a variant that has the ordered arrayList as return type?
limpid bane
Is there a variant that has the ordered arrayList as return type?
you can clone() and then order that one
tired sparrow
you can `clone()` and then order that one
Sorry I'm just starting with Zig. How should I use clone from what I have now: var somrArrayListOrd = std.mem.sort(u32, someArrayList.items, {}, std.sort.desc(u32))
limpid bane
Sorry I'm just starting with Zig. How should I use `clone` from what I have now:...
var orderedArray = try someArray.clone();
std.mem.sort(u32, orderedArray.items, {}, std.sort.desc(u32));
that seems like a not so good idea
limpid bane
although thats only if you need an unordered version too
tired sparrow
although thats only if you need an unordered version too
No, I need the only the ordered version. Which is retrieved form the unordered on...
limpid bane
then just std.mem.sort(u32, someArray.items, {}, std.sort.desc(u32)) is all you need
someArray will be sorted after that line
the sorting functions change the underlying data in the list you give it to become sorted
tired sparrow
A very big thank you!