[API Proposal]: Collections: Add useful inverses #683

Background and motivation

See demystifyfp/FsToolkit.ErrorHandling#377

API Proposal

isNotEmpty // see https://github.com/jet/propulsion/blob/master/src/Propulsion/Internal.fs#L239
reject
none

API Usage

see demystifyfp/FsToolkit.ErrorHandling#377

Alternative Designs

Don't implement anything, keep doing:

not << isEmpty
filter (not << predicate)
forall (not << predicate)
isNotEmpty xs && forall predicate xs

Risks

Possible divergence/clash with future F# core additions.

Are you willing to help with a proof-of-concept (as PR in that or a separate repo) first and as pull-request later on?

No Maybe