[ruby-core:121784] [Ruby Feature#21284] Request: add `Array#pad` method

Issue #21284 has been updated by MatzFan (Brian Cohen).


> What should happen if the size is smaller than what currently set?

If the `pad_to_length` argument is less than or equal to the array's current size the array is returned unchanged. If it is larger, elements of the specified kind are pushed to the array until it reaches `pad_to_length` size and the modified array returned.

----------------------------------------
Feature #21284: Request: add `Array#pad` method
https://bugs.ruby-lang.org/issues/21284#change-112842

* Author: MatzFan (Brian Cohen)
* Status: Open
----------------------------------------
A method to pad an array of arbitrary length with objects up to a specified array size does not currently exist.

`Array#fill` does not do this and I therefore propose the following method:

``` ruby
class Array
  def pad(pad_to_length, object = nil)
    fill(object, size, pad_to_length - size)
  end
end
```

I have provided an [answer](https://stackoverflow.com/a/79591610/4114896) to a Stack Overflow question asking how this can be done in Ruby. I've also explained in a comment on the answer which suggests using `Array#fill` why this does not meet the exact need.



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