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keyword in or ∈ for membership checking #3589

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mahrud opened this issue Nov 23, 2024 · 0 comments
Open

keyword in or ∈ for membership checking #3589

mahrud opened this issue Nov 23, 2024 · 0 comments
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@mahrud
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mahrud commented Nov 23, 2024 •
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Originally from here:

I think ∈ should be a synonym for in so you can write for x ∈ L do ..., though maybe we can also add new syntactic sugar x in L which calls isMember!

To clarify, there would be two situations for in:

  • inside a for clause, acts as "for every element in L"
  • outside a for clause, acts as "whether element is a member in L"
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