Created
March 21, 2019 14:55
-
-
Save drozdziak1/449dd1722e60648373d2919e5234ca01 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
pub fn merge_no_sentinel<T: Clone + Ord>( | |
a: &mut [T], | |
p: usize, | |
q: usize, | |
r: usize, | |
) -> Result<(), Error> { | |
if !(p <= q && q <= r && r < a.len()) { | |
return Err(PQROutOfBounds(p, q, r).into()); | |
} | |
let left = a[p..q].to_vec(); | |
let right = a[q..=r].to_vec(); | |
let mut i = 0; | |
let mut j = 0; | |
for mut k in p..=r { | |
if i >= left.len() { | |
for item in &right[j..] { | |
a[k] = item.clone(); | |
k += 1; | |
} | |
break; | |
} | |
if j >= right.len() { | |
for item in &left[i..] { | |
a[k] = item.clone(); | |
k += 1; | |
} | |
break; | |
} | |
if left[i] <= right[j] { | |
a[k] = left[i].clone(); | |
i += 1; | |
} else { | |
a[k] = right[j].clone(); | |
j += 1; | |
} | |
} | |
Ok(()) | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment