Exercise: Inverted Table Index-Of | Index << >> |
invert← {↑¨↓⍉⍵} vert ← {⍉↑⊂⍤¯1¨⍵} u0←'fourscore' 'and' 'ten' 'years' 'ago' u1←'abc' u2←'USA' 'UK' 'China' 'Canada' 'Italy' 'Denmark' u3←?20⍴100 u←u0[?30⍴≢u0],u1[?30⍴≢u1],u2[?30⍴≢u2],⍪u3[?30⍴≢u3] x←invert tx←u[?30⍴≢u;] y←invert ty←u[?23⍴≢u;]
|