[ruby-core:114944] Re: [Ruby master Bug#19910] Set#delete_if behavior inconsistent with Array/Hash

=F0=9F=98=89

=D0=B2=D1=82, 3 =D0=BE=D0=BA=D1=82. 2023=E2=80=AF=D0=B3. =D0=B2 03:05, segi=
ddins (Samuel Giddins) via ruby-core <
[e-mail]>:

> Issue #19910 has been reported by segiddins (Samuel Giddins).
>
> ----------------------------------------
> Bug #19910: Set#delete_if behavior inconsistent with Array/Hash
> https://bugs.ruby-lang.org/issues/19910
>
> * Author: segiddins (Samuel Giddins)
> * Status: Open
> * Priority: Normal
> * ruby -v: 3.2.2
> * Backport: 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
> ----------------------------------------
> Given the following script:
>
> ```ruby
> #!/usr/bin/env ruby
>
> require 'set'
>
> def enum(collection)
>   i =3D 0
>   collection.delete_if do
>     i +=3D 1
>     raise ArgumentError if i =3D=3D 6
>     i.odd?
>   end
> rescue ArgumentError
>   return collection
> end
>
> pp enum([0, 1, 2, 3, 4, 5, 6, 7])
> pp enum([0, 1, 2, 3, 4, 5, 6, 7].to_h { [_1, _1] })
> pp enum([0, 1, 2, 3, 4, 5, 6, 7].to_set)
> ```
>
> It results in:
>
> ```
> [1, 3, 5, 6, 7]
> {1=3D>1, 3=3D>3, 5=3D>5, 6=3D>6, 7=3D>7}
> #<Set: {0, 1, 2, 3, 4, 5, 6, 7}>
> ```
>
> As you can see, when an exception is raise inside `delete_if` on
> Hash/Array, the already-considered elements are still removed from the
> array. For `Set`, no elements are deleted (due to the implementation that
> builds up an intermediary list of elements to delete, then removes them
> from the underlying hash afterwards). It would be very helpful if
> `Set#delete_if` behaved consistently with other core collection types
>
>
>
> --
> https://bugs.ruby-lang.org/
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