Please I need this to be explained : val collectio...

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[Ikem Nwodo]

Please I need this to be explained :
val collections = listOf(1, 2, 3, 5)
for ((index, element) in collections.withIndex())

[Dico]

First, .withIndex() is an extension function that associates all elements to their index using a Pair.
So you get an Iterable<Pair<Int, T>.

[Dico]

Second, Pair is a data class. Which provides component1() and component2() functions for its properties in the order they appear in the constructor.

[Dico]

(index, element) is deconstruction syntax, that uses those component functions in the same order.