Exercise 18 | Index << >> |
Write a model of f⌸ . Key←{ 0=⎕nc'⍺':⍵ ∇ ⍳≢⍵ j←⍋i←⍳⍨⍺ ↑ (⊂⍤¯1⊢⍺⌿⍨(⍳≢i)=⍳⍨i) ⍺⍺¨ (2≠/¯1,i[j]) ⊂[0] ⍵⌷⍨⊂j } _____________________ a Carlo John John Diane Roger Lisa (∨/a='o') {⊂⍵}Key a ┌─────┬─────┐ │Carlo│Diane│ │John │Lisa │ │John │ │ │Roger│ │ └─────┴─────┘ |