Scala grouping list into list tuples with one shared element

Question

What would be short functional way to split list

List(1, 2, 3, 4, 5) into List((1,2), (2, 3), (3, 4), (4, 5))

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Answer 1

You can zip the list with its tail:

val list = List(1, 2, 3, 4, 5)
// list: List[Int] = List(1, 2, 3, 4, 5)

list zip list.tail
// res6: List[(Int, Int)] = List((1,2), (2,3), (3,4), (4,5))

Scala grouping list into list tuples with one shared element

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