Averages/Mode: Difference between revisions

=={{header|Kotlin}}==

<lang scala>// version 1.0.6

fun <T> modeOf(a: Array<T>) {

val sortedByFreq = a.groupBy { it }.entries.sortedByDescending { it.value.size }

val maxFreq = sortedByFreq.first().value.size

val modes = sortedByFreq.takeWhile { it.value.size == maxFreq }

if (modes.size == 1)

println("The mode of the collection is ${modes.first().key} which has a frequency of $maxFreq")

else {

print("There are ${modes.size} modes with a frequency of $maxFreq, namely : ")

println(modes.map { it.key }.joinToString(", "))

}

}

fun main(args: Array<String>) {

val a = arrayOf(7, 1, 1, 6, 2, 4, 2, 4, 2, 1, 5)

println("[" + a.joinToString(", ") + "]")

modeOf(a)

println()

val b = arrayOf(true, false, true, false, true, true)

println("[" + b.joinToString(", ") + "]")

modeOf(b)

}</lang>

{{out}}

<pre>

[7, 1, 1, 6, 2, 4, 2, 4, 2, 1, 5]

There are 2 modes with a frequency of 3, namely : 1, 2

[true, false, true, false, true, true]

The mode of the collection is true which has a frequency of 4

</pre>