[ruby-core:103278] [Ruby master Feature#15198] Array#intersect?

[ruby-core:103278] [Ruby master Feature#15198] Array#intersect?

[c4am95]

Issue #15198 has been updated by c4am95 (Travis Hunter).


Matz/Marc-Andre: anything I can do to help here as far as documentation or providing more use cases? I/my colleagues would love to see this make it into Ruby.

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Feature #15198: Array#intersect?
https://bugs.ruby-lang.org/issues/15198#change-91364

* Author: c4am95 (Travis Hunter)
* Status: Open
* Priority: Normal
----------------------------------------
I frequently find myself needing to determine if two arrays intersect but not actually caring about the intersection, so I write code like:
~~~ ruby
(a1 & a2).any?
~~~

It would be nice to have an **intersect?** convenience method on **Array** to perform this query.

[ruby#1972: Add Array#intersect?](https://github.com/ruby/ruby/pull/1972)



-- 
https://bugs.ruby-lang.org/

[ruby-core:103301] [Ruby master Feature#15198] Array#intersect?

[marcandre-ruby-core]

Issue #15198 has been updated by marcandre (Marc-Andre Lafortune).

Assignee set to matz (Yukihiro Matsumoto)

I am positive on the feature as has valid use cases, it can be optimized in C and as a bonus adds no cognitive load.

I believe we just need a final "yay" from Matz. I'll add it to the next meeting's agenda.

----------------------------------------
Feature #15198: Array#intersect?
https://bugs.ruby-lang.org/issues/15198#change-91386

* Author: c4am95 (Travis Hunter)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
I frequently find myself needing to determine if two arrays intersect but not actually caring about the intersection, so I write code like:
~~~ ruby
(a1 & a2).any?
~~~

It would be nice to have an **intersect?** convenience method on **Array** to perform this query.

[ruby#1972: Add Array#intersect?](https://github.com/ruby/ruby/pull/1972)



-- 
https://bugs.ruby-lang.org/

[ruby-core:103474] [Ruby master Feature#15198] Array#intersect?

[matz]

Issue #15198 has been updated by matz (Yukihiro Matsumoto).


Accepted.

Matz.


----------------------------------------
Feature #15198: Array#intersect?
https://bugs.ruby-lang.org/issues/15198#change-91572

* Author: c4am95 (Travis Hunter)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
I frequently find myself needing to determine if two arrays intersect but not actually caring about the intersection, so I write code like:
~~~ ruby
(a1 & a2).any?
~~~

It would be nice to have an **intersect?** convenience method on **Array** to perform this query.

[ruby#1972: Add Array#intersect?](https://github.com/ruby/ruby/pull/1972)



-- 
https://bugs.ruby-lang.org/

[ruby-core:103475] [Ruby master Feature#15198] Array#intersect?

[knu]

Issue #15198 has been updated by knu (Akinori MUSHA).


We discussed this in today's developer meeting.  Here are some remarks:

- It takes one argument for now.
- It means !(a & b).empty? instead of (a & b).any? so [nil].intersect?([nil]) evaluates to true.
- The implementation will internally use a hash to match the behavior of Array#&.


----------------------------------------
Feature #15198: Array#intersect?
https://bugs.ruby-lang.org/issues/15198#change-91573

* Author: c4am95 (Travis Hunter)
* Status: Open
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
----------------------------------------
I frequently find myself needing to determine if two arrays intersect but not actually caring about the intersection, so I write code like:
~~~ ruby
(a1 & a2).any?
~~~

It would be nice to have an **intersect?** convenience method on **Array** to perform this query.

[ruby#1972: Add Array#intersect?](https://github.com/ruby/ruby/pull/1972)



-- 
https://bugs.ruby-lang.org/