score:75
Accepted answer
You can use
val unwanted = list2.toSet
list1.filterNot(unwanted)
to remove all items in list2 (you don't need knowledge of duplicates in list2).
score:9
You could try this:
val list1 = List("word1","word2","word2","word3","word1")
val list2 = List("word1","word4")
println(list1.filterNot(list2.contains(_)))
score:15
val list1 = List("word1","word2","word2","word3","word1")
val list2 = List("word1","word4")
list1 diff list2
This will do it.
Source: stackoverflow.com
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