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Update southbound comment

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Bert Peters
2021-12-29 15:36:46 +01:00
parent 9dacb4c1ae
commit 09b590e927
1 changed files with 1 additions and 1 deletions
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2021/src/day25.rs
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@@ -35,7 +35,7 @@ fn advance(width: usize, state: &mut [u8]) -> bool {
} }
} }
// Now the southbound herd. Y in the outer loop for better cache locality // Then move the southbound herd. Need to do by column because of the first entry special case
for x in 0..width { for x in 0..width {
let last_index = state.len() - width + x; let last_index = state.len() - width + x;
let swap_last = state[x] == b'.' && state[last_index] == b'v'; let swap_last = state[x] == b'.' && state[last_index] == b'v';