Tilde Diaeresis ⍨
Tilde Diaeresis is a monadic operator with a dyadic operand
Operator Tilde Diaeresis means Commute
2 ⍴ 3 ⍝ ⍺ ⍴ ⍵
3 3
2 ⍴⍨ 3 ⍝ ⍵ ⍴ ⍺
2 2 2
⍴⍨ 3 ⍝ ⍵ ⍴ ⍵
3 3 3
'mu'⍨ 'any' ⎕NULL ⍝ Always returns its operand
mu
1E100 ('mu'⍨) 1j1
mu
¯1⍨¨ ⍳2 3
¯1 ¯1 ¯1
¯1 ¯1 ¯1