Set,List to HashMap (Kotlin)

*ToHashMap.kt

/*Transform a *Set* into a *HashMap**/
suspend fun <T> Set<T>.toHashMap(): HashMap<Int, T> = withContext(Dispatchers.IO) {
    val hashMap: HashMap<Int, T> = HashMap()
    var index = 0
    this@toHashMap.forEach {
        if (hashMap.isEmpty()) hashMap[0] = it else index = hashMap.size; hashMap[index++] = it
    }
    hashMap
}

/*Transform a *List* into a *HashMap**/
suspend fun <T> List<T>.toHashMap(): HashMap<Int, T> = withContext(Dispatchers.IO) {
    val hashMap: HashMap<Int, T> = HashMap()
    var index = 0
    this@toHashMap.forEach {
        if (hashMap.isEmpty()) hashMap[0] = it else index = hashMap.size; hashMap[index++] = it
    }
    hashMap
}