Hello folks. How do i idiomatically remove elements from an ArrayList based on certain predicates? . Something like filter from the functional paradigm ?
#Removing Elements from Lists ?
devout solstice
buoyant quest
latent forge
var read_index: usize = 0;
var write_index: usize = 0;
while (read_index < list.items.len) : (read_index += 1) {
if (pred(list.items[read_index])) {
list.items[write_index] = list.items[read_index];
write_index += 1;
}
}
list.shrinkRetainingCapacity(write_index);
fair stag
Hello folks. How do i idiomatically remove elements from an `ArrayList` based on...
depending on how big the array is, it might be more efficient to re-create the arraylist and fill it with matching elements (can be done trivially with a for loop)
otherwise, youd want to use a while loop with list.orderedRemove or similar
fair stag
```
var read_index: usize = 0;
var write_index: usize = 0;
while (read_index < l...
oh thats smart, havent thought of that
devout solstice
depending on how big the array is, it might be more efficient to re-create the a...
i was also thinking about that.. but that would require an allocator right ?
fair stag
it would
devout solstice
```
var read_index: usize = 0;
var write_index: usize = 0;
while (read_index < l...
👍 ... this seems to do the trick...
fair stag
technically you could borrow the arraylist's backing allocator but that's pretty bad UX
devout solstice
hmm.... got it... i did not even think that you could use the allocator from the list itself