[ruby-core:96226] [Ruby master Feature#16039] Array#contains? to check if one array contains another array

Issue #16039 has been updated by Dan0042 (Daniel DeLorme).


There's some similarity with #15198, to the point that I can re-use my suggestion from there:

It might make sense to use ary1.to_set.superset?(ary2). That way it makes explicit the fact that ary1 must be converted to a set. But Set#superset? would have to support any Enumerable.

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Feature #16039: Array#contains? to check if one array contains another array
https://bugs.ruby-lang.org/issues/16039#change-83118

* Author: cha1tanya (Prathamesh Sonpatki)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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I woud like to propose `Array#contains?` which will check if the one array is part of another array.
Implementation can be as follows:

```
def contains?(other)
  (other - self).empty?
end
```

Some test cases:

```
[1, 2, 3].contains?([2, 3]) => true
[1, 2, 3].contains?([]) => true
[1, 2, 3].contains?([1, 2, 3, 4]) => false
[].contains?([]) => true
[].contains?([1, 2, 3, 4]) => false
```



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