pub fn quick_sort<T, F>(arr: &mut [T], compare: F)
where
F: Fn(&T, &T) -> bool + Copy,
{
if arr.len() <= 1 {
return;
}
let pivot_index = partition(arr, compare);
quick_sort(&mut arr[0..pivot_index], compare);
quick_sort(&mut arr[pivot_index + 1..], compare);
}
fn partition<T, F>(arr: &mut [T], compare: F) -> usize
where
F: Fn(&T, &T) -> bool,
{
let pivot_index = arr.len() / 2;
arr.swap(pivot_index, arr.len() - 1);
let mut i = 0;
for j in 0..arr.len() - 1 {
if compare(&arr[j], &arr[arr.len() - 1]) {
arr.swap(i, j);
i += 1;
}
}
arr.swap(i, arr.len() - 1);
i
}