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[day4] optimize condition
+3
-6
+3
-6
src/days/day4.gleam
+3
-6
src/days/day4.gleam
···
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fn count_neighbours(cell: Paper, grid: Grid) {
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grid.cells
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-
|> list.filter(fn(paper) { !{ cell.x == paper.x && cell.y == paper.y } })
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|> list.filter(fn(paper) {
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case cell.x + 1 == paper.x || cell.x - 1 == paper.x || cell.x == paper.x {
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True ->
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cell.y + 1 == paper.y || cell.y - 1 == paper.y || cell.y == paper.y
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False -> False
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}
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!{ cell.x == paper.x && cell.y == paper.y }
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&& { cell.x + 1 == paper.x || cell.x - 1 == paper.x || cell.x == paper.x }
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&& { cell.y + 1 == paper.y || cell.y - 1 == paper.y || cell.y == paper.y }
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})
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|> list.length
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}