Kotlin Utility Functions Added to Builtin Classes for convenience.

Utility.kt

fun List<Int>.isEqualTo(other: List<Int>): Boolean {
    if (this.size != other.size) {
        return false
    }
    return (0..this.size - 1).all { this[it].equals(other[it]) }
}

fun List<Int>.isNotEqualTo(other: List<Int>): Boolean {
    if (this.size != other.size) {
        return true
    }
    return (0..this.size - 1).any { !this[it].equals(other[it]) }
}

fun Int.toBigInteger(): BigInteger {
    return BigInteger.valueOf(this.toLong())
}