Proposal: lists:reject/2

Erlang/OTP Proposals Proposals: Ideas
1

I’m using lists:filter/2, and my predicate has a number of clauses. Then I want to invert the sense of the predicate.

Elixir’s got Enum.reject/2. Would Erlang be improved by having the same?

Alternatives considered; I like neither:

  • lists:partition/2 in both cases – can just match the other element in the tuple.
  • Adding a local invert (or similar) function to wrap the predicate, reversing the sense.
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2

Well, that was simpler than I expected: Add lists:reject/2 by rlipscombe · Pull Request #10692 · erlang/otp · GitHub

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