You may wonder why monadic { and dyadic { are yoked to the same symbol.
A=: ? 5 13 11 $ 100
i=: 1 2;3 4 5;6 7
(<i){A
32 29
3 20
73 67
65 18
59 42
94 61
({i){A
32 29
3 20
73 67
65 18
59 42
94 61
((<i){A) -: ({i){A
1
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