LeetCode 6 Group Anagrams

groupanagrams.kt

fun main(args: Array<String>) {
    groupAnagrams(arrayOf("eat", "tea", "tan", "ate", "nat", "bat"))
}
fun groupAnagrams(strs: Array<String>): List<List<String>> {
    //Loop through array
    val myMap = mutableMapOf<String, MutableList<String>>()
    strs.forEach {
        //take word and put in alphabetical order
        val alphaOrdered = it.toCharArray().sorted().joinToString("")
        //use alphabetized string as hash key
        //set has value to word
        val theValue = myMap[alphaOrdered]
        if (theValue == null) {
            myMap[alphaOrdered] = mutableListOf(it)
        } else {
            myMap[alphaOrdered]?.add(it)
        }
    }
    //make list of list of values for each key in hash
    return myMap.values.toList()
}