Iskren
@izkreny.bsky.social
Ruby and Rails Developer (in training)
Recently, I discovered @cassidoo.co's colorful and beautifully handcrafted website and immediately subscribed to her insightful and funny weekly newsletter. As a bonus, there is an Interview QOTW inside each one, and this is my answer to the last one. More details: gist.github.com/izkreny/fae8...
![**Given an integer array and a number `n`, move all of the `n`s to the end of the array while maintaining the relative order of the non-`n`s.**
Bonus: do this without making a copy of the array!
Example:
```
$ moveNums([0,2,0,3,10], 0)
$ [2,3,10,0,0]
```
IMPORTANT: Ruby 3.4+ required because of default `it` block parameter!
Methods used:
* [Enumerable#partition](https://docs.ruby-lang.org/en/master/Enumerable.html#method-i-partition)
* [Array#flatten](https://docs.ruby-lang.org/en/master/Array.html#method-i-flatten)
```ruby
def move_numbers(integer_array, number) = integer_array.partition { it != number }.flatten
p move_numbers([ 0, 2, 0, 3, 10 ], 0) # => [2, 3, 10, 0, 0]
```
NO AI WAS USED IN THE CODING OF THIS SOLUTION! 🖖](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:hsxo3zhokwcxzilh4z3dyarj/bafkreiazaz2vnpbj2zojl6tig4twdibyab7ajgop5bpjbtl2w63taltzbu@jpeg)
February 11, 2026 at 2:21 PM
Recently, I discovered @cassidoo.co's colorful and beautifully handcrafted website and immediately subscribed to her insightful and funny weekly newsletter. As a bonus, there is an Interview QOTW inside each one, and this is my answer to the last one. More details: gist.github.com/izkreny/fae8...