Suggestion: Operator `in` for slices

Ola Fosheim Grøstad ola.fosheim.grostad at
Sun Jan 2 10:48:33 UTC 2022

On Sunday, 2 January 2022 at 02:33:22 UTC, Elronnd wrote:
> A redblacktree is not a sequence, though; its elements are not 
> keyed in any way.

Right, "in" is a set operator. You can implement a set as a dict 
with null-values, then you can think of the keys as values. If 
you think of the ADT as the set-concept then what is a key and 
what is a value is a matter of interpretation. If you think of a 
binary tree (or rbtree) as a set, then the distinction between 
key and value becomes blurred.

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