How to find duplicate elements in two different arrays

Question

How do I find duplicate values in two different arrays ?

Pseudo-code:

array1["a", "b", "c", "d"]

array2["b", "d", "e", "f"]

duplicatesFound = findDuplicates(array1, array2) //will return ["b", "d"]

Does this answer your question? Intersection of two lists maintaining duplicate values in Kotlin — Alain Stulz
– Alain Stulz, Commented Apr 15, 2020 at 13:49

Ben Shmuel · Accepted Answer · 2020-04-15 10:11:00Z

2

obviously there is more than one way to solve it, here is one: You can use Intersect between two Iterable arrays. for example

    val a1 = arrayListOf("a", "b", "c", "d")
    val a2 = arrayListOf("b", "d", "e", "f")

    val intersect = a2.intersect(a1)

    Log.d(TAG,intersect.toString()) // prints [b,d]
    Log.d(TAG,"${intersect.size}") // prints 2

edited Apr 15, 2020 at 10:11

answered Apr 15, 2020 at 10:02

Ben Shmuel

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