Question

How to convert a character (flatten) matrix to a single string in Kotlin

Answer 1

fun flattenMatrix(matrix: List<List<Char>>): String =
    matrix.flatten().joinToString("")

fun main() {
    val matrix = listOf(
        listOf('H', 'e', 'l', 'l', 'o'),
        listOf(' ', 'W', 'o', 'r', 'l', 'd'),
        listOf('!')
    )

    val output = flattenMatrix(matrix)
    println("Flattened string: $output")
}



/*
run:

Flattened string: Hello World!

*/

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