[ruby-core:96225] [Ruby master Feature#16039] Array#contains? to check if one array contains another array

Issue #16039 has been updated by JustJosh (Joshua Stowers).


sawa (Tsuyoshi Sawada) wrote:
> by analogy from `Range`, `cover?` may be a better name.

I was never a fan of the name `cover?`, but the verbiage is still applicable here and it is better to be consistent.

In my opinion, the method should also accept non-array arguments.
For example:
``` ruby
[1, 2, 3].cover? 1, 2 # => true
```






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Feature #16039: Array#contains? to check if one array contains another array
https://bugs.ruby-lang.org/issues/16039#change-83117

* Author: cha1tanya (Prathamesh Sonpatki)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
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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