Check if an array is subset of another array in Ruby
ruby
Solution
Use sets. Then you can use `set.subset?`. Example:
require 'set'
a1 = Set[3,6,4]
a2 = Set[1,2,3,4,5,6,7,8,9]
puts a1.subset?(a2)
Output:
true
See it working online: ideone
Problem
How can I check whether one array is a subset of another array, regardless of the order of elements? ``` a1 = [3, 6, 4] a2 = [1, 2, 3, 4, 5, 6, 7, 8, 9] ...? a1 is a subset of a2 ```