deleting multiple key and value pair from hash in rails

Question

hi i have a hash like

number = {:a => 1,:b => 2, :d => 3, :d =>4} upon evaluation of certain condition i want to delete key n value pair of a,b,c

Thanks in advance

Answer 1

number.delete "A"
number.delete "B"
number.delete "C"

Or, less performant but more terse:

number.reject! {|k, v| %w"A B C".include? k }