sorting an array that contains nil in Ruby using sort_by

DAI — Sat, 16 Mar 2024 11:18:45 +0000

Hi, I'm CEO at Indieverse and owner of DAINOTE

Premise

arr = [1,2,3,4,5,nil,6,7,8]
arr.sort_by{|item| item}
# -> ArgumentError: comparison of Integer with nil failed

When nil is present, I want to consider the nil value and change it to the oldest value before sorting


ruby
arr = [1,2,3,4,5,nil,6,7,8]
arr.sort_by { |item| item.nil? ? Float::INFINITY : item }