Menengah Exercism • kotlin

Custom Set

Ringkasan Tantangan

Create a custom set type.

Instructions

Create a custom set type.

Sometimes it is necessary to define a custom data structure of some type, like a set. In this exercise you will define your own set. How it works internally doesn’t matter, as long as it behaves like a set of unique elements.

Community Solutions

Lihat Solusi Komunitas

The following are the top 3 community solutions by stars:

Solution 1 by @lotharschulz (⭐ 3) — View on Exercism
Solution 2 by @tony1427 (⭐ 0) — View on Exercism
Solution 3 by @m00tiny (⭐ 0) — View on Exercism

Source: Exercism kotlin/custom-set

💡 Lihat Solusi

class CustomSet (vararg ds: Int){
    private val d = mutableListOf<Int>()
    init { d.addAll(ds.distinct()) }

    fun isEmpty(): Boolean = d.isEmpty()
    fun isSubset(other: CustomSet): Boolean = d.all { other.contains(it) }
    fun isDisjoint(other: CustomSet): Boolean = this.isEmpty() || this.intersection(other).isEmpty()
    fun contains(other: Int): Boolean = d.contains(other)
    fun intersection(other: CustomSet): CustomSet = CustomSet(*(this.d.filter { other.sData().contains(it) }.toIntArray()))
    fun add(other: Int) { if (!d.contains(other)) d.add(other) }