Feature #13657: Simplify usage of Enumerable#reject

• Status: Rejected
• Assignee: -
• Target version: -

[JustJosh (Joshua Stowers)]

The reject method is more complicated than it has to be when removing only a specific value.
It would be convenient if we could just plug in the value we wish to delete as an optional argument, for example:

[1, 2, 3, 4].reject(3) # => [1, 2, 4]

as apposed to:

[1, 2, 3, 4].reject { |element| element == 3 } # => [1, 2, 4]

The next best method I can think of is #delete, but that returns the value which is deleted.

[shyouhei (Shyouhei Urabe)]

• Status changed from Open to Rejected

That's grep_v.

[1, 2, 3, 4].grep_v(3) # => [1, 2, 4]

[JustJosh (Joshua Stowers)]

Great! You're right, that will accomplish this exactly.

Do you see any hope in adding this functionality to #reject regardless of the existence of #grep_v?
This other method is difficult to make sense of unless the developers are either familiar with it already or have used grep extensively enough to recognize its purpose.

Adding the functionality would also reduce the number of methods developers have to know.
Also it wouldn't hurt to have.

Thanks for pointing out the existence of #grep_v

[shyouhei (Shyouhei Urabe)]

I guess this request is a variant of https://bugs.ruby-lang.org/issues/11286 (if not identical). You would like to join the thread which is still open, i.e there are chances to introduce your request.