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APL Exercises 6
Key Operator
 

⎕io←0 throughout.
 

6.0 Drills

Predict the result of each expression before evaluating it.

x←'Mississippi'
y←10+11 2⍴⍳22
{⍺⍵}⌸x
{⍺ (≢⍵)}⌸x
{≢⍵}⌸x
{⍺}⌸x
 
x{⍺⍵}⌸y
x{⍺ (≢⍵)}⌸y
x{≢⍵}⌸y
x{⍺}⌸y
x{⍺(+/,⍵)}⌸y
x{⍺(⌈/,⍵)}⌸y
x{⍺(⌊/,⍵)}⌸y
 
x←?1e4⍴100
¯1+{≢⍵}⌸(⍳100),x
+/(⍳100)∘.=x