Think of ss below as a list of four sets; elements are in the inner boxes.
Verb si gives the index of the first set in which an element is found. Your
task is to write verb si .
]ss =: (<0);(1;2);(3;4;5);< 6;7;8;9
+---+-----+-------+---------+
|+-+|+-+-+|+-+-+-+|+-+-+-+-+|
||0|||1|2|||3|4|5|||6|7|8|9||
|+-+|+-+-+|+-+-+-+|+-+-+-+-+|
+---+-----+-------+---------+
ss si 1;13;8 NB. 1 in set 1, 13 not found, 8 in set 3
1 4 3
--Kip Murray
Sent from my iPad
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