Android Kotlin: map or other equivalent of converting a List to a List of Pairs?

Question

Suppose I have this:

listOf("ball","apple","zebra","cat")

I want to convert this to:

listOf(Pair("ball","b"),Pair("apple","a"),Pair("zebra","z"),Pair("cat","c"))

Basically I want the second of the Pair to be a value computed using the array value.

I realize I can create this using some combinations of a for loop. But is there a built in way using some function similar to map which does this?

Ravi Kumar · Accepted Answer · 2021-07-10 03:41:32Z

3

You can do it like:

 val mylist = listOf("ball","apple","zebra","cat")
 val pairList = mylist.map{
       Pair(it, it[0])
   }
 print(pairList)

answered Jul 10, 2021 at 3:41

Ravi Kumar

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