3 lines
96 B
APL
3 lines
96 B
APL
upper ← ∘.!⍨¯1+⍳
|
||
lower ← ⍉(∘.!⍨¯1+⍳)
|
||
symmetric ← (⊢![1]∘.+⍨)¯1+⍳
|
upper ← ∘.!⍨¯1+⍳
|
||
lower ← ⍉(∘.!⍨¯1+⍳)
|
||
symmetric ← (⊢![1]∘.+⍨)¯1+⍳
|