How can you combine destructuring with a filter to create a list of values from a map where keys start with 'A'?

hard📝 Application Q9 of 15

Kotlin - Collections Fundamentals

Amap.filterKeys { it.startsWith("A") }.values.toList()

Bmap.map { (k, v) -> if (k.startsWith("A")) v else null }

Cmap.filter { (k, _) -> k.startsWith("A") }.map { (_, v) -> v }

Dmap.filterValues { it.startsWith("A") }.keys.toList()

Step-by-Step Solution

Solution:

Step 1: Use filter with destructuring to check keys
Filter entries where key starts with 'A' using (k, _) destructuring.
Step 2: Map filtered entries to values
Extract values from filtered entries using (_, v) destructuring.
Final Answer:
map.filter { (k, _) -> k.startsWith("A") }.map { (_, v) -> v } -> Option C
Quick Check:
Filter keys with destructuring, then map values [OK]

Quick Trick: Filter with (k, _) then map with (_, v) [OK]

Common Mistakes:

MISTAKES

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