Ruby is so beautiful <3!!

It seems to me that if the line is, for example, 'a' * 10000, then the complexity will be 10000 * 36 where 36 is the number of letters. I think this solution is not entirely suitable for lines with a lot of repeating characters.

yes but ruby probably created like 1 million objects under the hood which is why this is the slowest lol

Well I'll be damned...

seriously!? :)

Nope, this is not O(n^2). Just O(n) with a large coefficient (36, when corrected for digits).

Could you explain how this is O(n^2)?

omg I tot it will only remove the first instance of the element it found! Didn't realise it will remove all element...

But its less readable. Nice trade to discuss hahaha

I feel so outmatched right about now

name is a String object.
String class has the [] instance method that let you
extract parts of the String object.
In this case name[0] returnes the first character of name
name[1..-1] will give back a new string without the first character
https://ruby-doc.org/core-2.7.2/String.html#method-i-5B-5D

Why name with an array and 0 ? name[0]