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common_element.rb

This Ruby code snippet demonstrates finding common elements between two arrays (a and b). It first uses the & operator (intersection) to find the common elements, sorts them, and retrieves the first element. Then, it uses find with include? to find the first element in a that also exists in b, achieving the same result. Both methods return “l9ma” in this case.

Ruby code snippet

a = ["z3qx", "l9ma", "b77r", "x1p0"]
#=> ["z3qx", "l9ma", "b77r", "x1p0"]
b = ["x1p0", "l9ma", "wxyz"]
#=> ["x1p0", "l9ma", "wxyz"]

(a & b).sort.first
#=> "l9ma"
a.find { |x| b.include?(x) }
#=> "l9ma"

Executed with Ruby 3.4.5.