Would fail if event contains stuff like %d.

woow, thanks alot i didnt even know this.

have replaced the occurrences = Hash.new(0) with occurrences = {} .It throws an error and i dont understand why, who can explain the reason?

I'm a newbie in Ruby and managed to answer this coding problem using a different solution. I just want to understand how the above answer is possible if anyone can explain please?

It's correct to say that the problem does not require five_num to check for invalid input.

This approach changes the interface of Array, adding a new method that throws a NoMethodError when the Array instance doesn't conform to a special use case. As a result, any subsequent instance of Array can respond to a method that may be meaningless (and unsafe) for that instance.

Why change the interface of Array?

Or to put it another way, would this also be a good solution? Why or why not?

class Object
  def median...
  def first_quartile...
  def third_quartile...
end

Then it won't work, but the instructions say: Create a five_num method that takes an array of integers as an argument
so checking for invalid input is not a requirement.

What if an instance of Array contains non-Numeric values?

teach us gsub!

Not good

what does partition do

This is the fastest and best solution.

poetic

Just one small nit. size is preferred over lenght

https://rubystyle.guide/#map-find-select-reduce-include-size