我有array(1 and 2).我怎么array3能从他们那里得到的?
array(1 and 2)
array3
array1 = [2,2,2,2,3,3,4,5,6,7,8,9] array2 = [2,2,2,3,4,4,4,4,8,8,0,0,0] array3 = [2,2,2,3,4,8]
array1 & array2返回[2,3,4,8],但我需要保留重复.
array1 & array2
[2,3,4,8]
ruby arrays intersection
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