Thun/docs/reference/pick.md

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# pick
Basis Function Combinator
getitem == drop first
Expects an integer and a quote on the stack and returns the item at the
nth position in the quote counting from 0. :
[a b c d] 0 getitem
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a
Gentzen diagram.
## Definition
if not basis.
## Derivation
if not basis.
## Source
if basis
## Discussion
## Crosslinks