ruby - determine if an array contains all elements of another array often enough? -

i have array available elements , array required elements. want find out if required elements available.

the arrays may contain "duplicates". there must many elements available required. first trial #contains? method fails because include? checks if element available @ least once

-- edit: simplified example code --

# first , simple trial # fails on duplicate elements class array   def contains?(other)     other.all? { |element| include?(element) }         end       end  available = [1, 1, 1, 2, 2, 3] small = [1, 1, 2, 3]   big = [1, 1, 2, 3, 3]   available.contains?(small) # true intended available.contains?(big)   # true should false                            # because "big" contains more "3s" "available" 

def contains?(other)   other.elements.group_by{|e| e}.all?{|e, a| elements.count(e) >= a.length} end