Ruby Array Intersection
21 Aug 2023TIL you can find the intersection of two Arrays easily with &.
a = [18, 22, 33, 4, 5, 6]
b = [5, 4, 22, 1, 88, 9]
c = [18, 22, 33, 40, 50, 6]
# a intersecting b
puts "intersection of a and b : #{a & b}\n\n"
# => intersection of a and b : [22, 4, 5]
# a intersecting c
puts "intersection of a and c : #{a & c}\n\n"
# =>intersection of a and c : [18, 22, 33, 6]
# b intersecting c
puts "intersection of b and c : #{b & c}\n\n"
# => intersection of b and c : [22]
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