Given a map val data = mapOf("a" to 1, "b" to 2.5, "c" to 3), how do you convert all values to Double explicitly?

hard📝 Application Q9 of 15

Kotlin - Data Types

Given a map val data = mapOf("a" to 1, "b" to 2.5, "c" to 3), how do you convert all values to Double explicitly?

Aval converted = data as Map<String, Double>

Bval converted = data.mapValues { it.value as Double }

Cval converted = data.mapValues { it.value.toDouble() }

Dval converted = data.toDouble()

Step-by-Step Solution

Solution:

Step 1: Understand map value conversion
Use mapValues with explicit toDouble() to convert all values.
Step 2: Check options
val converted = data.mapValues { it.value.toDouble() } correctly converts values. val converted = data as Map tries unsafe cast. val converted = data.mapValues { it.value as Double } uses 'as' which may fail. val converted = data.toDouble() is invalid.
Final Answer:
val converted = data.mapValues { it.value.toDouble() } -> Option C
Quick Check:
Use mapValues with toDouble() for map value conversion [OK]

Quick Trick: Use mapValues { it.value.toDouble() } to convert map values [OK]

Common Mistakes:

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