Convert Map<String,List<String>> to List<Map<String,String>> in Kotlin

Question

Input: {param1=[x1,y1], param2=[p1,q1],param3=[m1,n1]....}

Output: [{param1=x1, param2=p1,param3=m1....},{param1=y1, param2=q1,param3=n1....}]

I need to convert this input Map<String,List<String>> to List<Map<String,String>> Any help is appreciated. Your help can save my day.. Thank you

JB Nizet · Accepted Answer · 2019-12-07 09:19:19Z

1

val source =
    mapOf(
        "param1" to listOf("x1", "y1"),
        "param2" to listOf("p1", "q1"),
        "param3" to listOf("m1", "n1")
    )

val result = source.values.first().indices.map { index ->
    source.entries.associate { (param, list) -> param to list[index] }
}

answered Dec 7, 2019 at 9:19

JB Nizet

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1 Comment

Tech Drago Over a year ago

Thanks a lot, I'm new to fp and have been trying to do the same with zip and i was going no where.

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