You want the index function, applied with the each operator:
A←(5 3 2) (3 9 1)
B←2 1
B⌷¨A
3 3
Note that you should not confuse the index function with the quad function, which is a wider box.
문제
I've looked everywhere for a function to do this but given a nested vector
A←(5 3 2) (3 9 1)
I'd like to index it with B
B ← 2 1
So that for the first item in A, the 2nd item will be returned. And for the second item for A will have 3 (the first item) returned.
해결책
You want the index function, applied with the each operator:
A←(5 3 2) (3 9 1)
B←2 1
B⌷¨A
3 3
Note that you should not confuse the index function with the quad function, which is a wider box.
다른 팁
You could also use "pick": B⊃¨A