Challenge - Word Analytics

Part of the Logic & Flow section of Coddy's Kotlin journey. Lesson 61 of 63.

Challenge

Expert

Complete wordAnalytics with parameters lines: List<String>. Extract all consecutive ASCII letter groups with [A-Za-z]+ from every line, lowercase them, and count occurrences. Return word=count entries by decreasing frequency, breaking ties alphabetically. Digits and punctuation separate words.

Unless stricter bounds are stated above, collections contain at most 100 elements at each level, and integer arguments and integer collection values are between -1000 and 1000. Text supplied for parsing can include invalid or out-of-range representations as described.

Return a value of type List<String>. Keep the supplied input/output code. It reads scalar arguments one per line; a list starts with its count followed by its elements, and a map starts with its entry count followed by each key and value. Nested lists repeat the count-and-elements format for each row. The supplied main prints the return value followed by one newline. Lists use Kotlin's standard bracketed format; print no additional labels.

Try it yourself

fun wordAnalytics(lines: List<String>): List<String> {
    // Write your solution here.
    return emptyList()
}
fun main() {
    val linesCount = readln().toInt()
    val lines = mutableListOf<String>()
    for (i0 in 0 until linesCount) {
        val linesItem = readLine().orEmpty()
        lines.add(linesItem)
    }
    println(wordAnalytics(lines))
}