Question in passing elements of 2 same-length lists by 'each' keyword

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1

https://learninghub.kx.com/forums/topic/question-in-passing-elements-of-2-same-length-lists-by-each-keyword

Hello all,


Is it possible to pass elements of 2 same-length lists by 'each' keyword in the same time? In my case, list 1 is a nested list of lists, and list 2 contains index of the element on each row in list 1, so I would like to do something like:

{[e1;e2] e1[e2] : new values } [ ; ] each list1,list2

Is there any simple way to do so?


Thanks very mush.


Jacky

2

' form of each https://code.kx.com/q/ref/maps/#each

q){x[y]:99;x}'[(1 2 3;4 5 6;7 8 9);0 1 2]
99 2  3
4  99 6
7  8  99

Amend at @ version https://code.kx.com/q/ref/apply/#amend-amend-at

q){@[x;y;:;99]}'[(1 2 3;4 5 6;7 8 9);0 1 2]
99 2  3
4  99 6
7  8  99

q)@[;;:;99]'[(1 2 3;4 5 6;7 8 9);0 1 2]
99 2  3
4  99 6
7  8  99