Have you ever had an array that you only want to include unique elements?
1 2 3 4 list_1 = ['apple', 'orange', 'grape'] list_2 = ['strawberry', 'apple'] combined_list = (list_1 + list_2).uniq combined_list #=> ["apple", "orange", "grape", "strawberry"]
In this example we’re combining
list_2, then removing duplicate entries using the
#uniq method before assigning to the
Another approach would be to not include duplicate elements all together using one of the array set operators: the union operator