How do I remove an element from an array in a case-insensitive way?

Question

I’m suing Ruby 2.3. When I want to remove a string element from an array by value, I can do

2.3.0 :005 > a.delete("AB")
 => "AB" 

but how do I remove the element in a case-insensitive way? That is, how can I make

a.delete(“ab”)

behave like

a.delete(“AB”)

?

Answer 1

Try delete_if

a.delete_if { |s| s.downcase == 'ab' }