Nested map iterator in scala

Question

I'm have Nested Map output in my code like below

Map(test -> 113123, "cat" -> None, myList -> Map(test2 -> 321323, test3 -> 11122))

But I wanted output like below using scala iterator if anyone knows please help me on this as I'm very new Scala

Map(test -> 113123, "cat" -> None, myList -> Some(Map(test2 -> 321323, test3 -> 11122)))

Anahcolus · Accepted Answer · 2018-06-18 15:50:34Z

1

Supposing that you have data like

val data = Map("test" -> 113123, "cat" -> None, "myList" -> Map("test2" -> 321323, "test3" -> 11122))
//data: scala.collection.immutable.Map[String,Any] = Map(test -> 113123, cat -> None, myList -> Map(test2 -> 321323, test3 -> 11122))

Then you can do

val output = data.map(x => if (x._2.isInstanceOf[Map[String, Long]]) (x._1 -> Some(x._2)) else x)
//output: scala.collection.immutable.Map[String,Any] = Map(test -> 113123, cat -> None, myList -> Some(Map(test2 -> 321323, test3 -> 11122)))

to get your desired output

And you can use println to see the output as

println(output)
//Map(test -> 113123, cat -> None, myList -> Some(Map(test2 -> 321323, test3 -> 11122)))

edited Jun 18, 2018 at 15:50

answered Jun 18, 2018 at 14:37

Anahcolus

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9 Comments

JSF Learner Over a year ago

val output = data.map(x => if (x._2.isInstanceOf[Map[String, Long]]) (x._1 -> Some(x._2)) else x) println(output), i'm not getting any output for this, could you please help me on this

Anahcolus Over a year ago

you have to print them or save it in a file.

JSF Learner Over a year ago

I want to create the new map from existing map with some value

JSF Learner Over a year ago

I wanted output like this : Map(test -> 113123, "cat" -> None, myList -> Some(Map(test2 -> 321323, test3 -> 11122)))

dyrkin Over a year ago

myMap.mapValues { case v@Option => v case v => Some(v) }

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