From: mame@...
Date: 2021-06-04T06:04:01+00:00
Subject: [ruby-core:104162] [Ruby master Feature#12075] some	container#nonempty?

Issue #12075 has been updated by mame (Yusuke Endoh).


I like `Array#some?` and `Hash#some?`. It is so frequent to write `!ary.empty?`.

I think the main concern is only about `empty?`, not other predicate methods. So I'm skeptural about the need of the generalization like `ary.not(:empty?)`. I don't like it very much because it is longer and slower than the dedicated method. 

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Feature #12075: some container#nonempty?
https://bugs.ruby-lang.org/issues/12075#change-92337

* Author: naruse (Yui NARUSE)
* Status: Feedback
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
I sometimes write following code.

```ruby
ary = some_metho_returns_nil_or_empty_container() # nil or "" or [] or {}

if ary && !ary.empty?
  #  some code
end
```

But the condition `ary && !ary.empty?` is too long and complex.
Though Ruby 2.3 introduces `&.`, but this can���t be written as `ary&.empty?`.

One idea is add `nonempty?` write as `ary&.nonempty?`.

akr: `nonempty?` is not good name because human is not good at handling 

This discussion matches following core classes:

* String
* Array
* Hash



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