From: anamma06@...
Date: 2018-08-30T08:51:34+00:00
Subject: [ruby-core:88746] [Ruby trunk Feature#14097] Add union and	difference to Array

Issue #14097 has been updated by ana06 (Ana Maria Martinez Gomez).


As @mame already said, I gave a talk at Euruko about this issue:

https://youtu.be/jUc8InwoA-E?t=2m54s

I did an standing up voting. As in the video you can not see the audience, here is the picture I took during the talk with the result of the voting:

https://user-images.githubusercontent.com/16052290/44840875-5cd3bf00-ac42-11e8-84e9-815bc6473719.jpg

The quality of the picture is not really good, but I have pixelized the faces of the recognizable people wearing a red cord (as they don't want to appear on pictures). I hope is fine.

There are more picture from the conference organization in better quality, which I will add as soon as they send them to me.



----------------------------------------
Feature #14097: Add union and difference to Array
https://bugs.ruby-lang.org/issues/14097#change-73799

* Author: ana06 (Ana Maria Martinez Gomez)
* Status: Assigned
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 
----------------------------------------
Currently there is a concat method in ruby which does the same as +, but modifying the object. We could introduce a union and difference methods, which would be the equivalent for the `|` and `-` operators. This operators are normally less used due to lack of readability and expressivity. You end seeing thinks like:

```
array.concat(array2).uniq!
```

just because it is more readable. When it could be written like:

```
array |= array2
```

But, as this is not clear for some people, the new method will solve this problem:

```
array.union(array2)
```

And now this is clean and readable, as everybody expect from Ruby, the language focused on simplicity and productivity. ;)


Can I send a PR? :)





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