Create 0380-insert-delete-getrandom-o1.kt

Author: a93a

kotlin/0380-insert-delete-getrandom-o1.kt

@@ -0,0 +1,53 @@
+/*
+* Containing the logic behind the operations, but a cleaner Kotlin solution is provided below.
+* Here implement some of the logic of the functions ourselves, as in the video, to have this solution compatible with the video solution.
+*/
+class RandomizedSet() {
+
+    val hs = HashSet<Int>()
+
+    fun insert(`val`: Int): Boolean {
+        if(hs.contains(`val`)) 
+            return false
+        else {
+            hs.add(`val`)
+            return true
+        }
+    }
+
+    fun remove(`val`: Int): Boolean {
+        if(hs.contains(`val`)){
+            hs.remove(`val`)
+            return true
+        }else 
+            return false
+    }
+
+    fun getRandom(): Int {
+        return hs.random()
+    }
+
+}
+ 
+/*
+* Cleaner Kotlin solution. add() and remove()
+*/
+class RandomizedSet() {
+
+    val hs = HashSet<Int>()
+
+    fun insert(`val`: Int) = hs.add(`val`)
+
+    fun remove(`val`: Int) = hs.remove(`val`)
+
+    fun getRandom() = hs.random()
+
+}
+
+/**
+ * Your RandomizedSet object will be instantiated and called as such:
+ * var obj = RandomizedSet()
+ * var param_1 = obj.insert(`val`)
+ * var param_2 = obj.remove(`val`)
+ * var param_3 = obj.getRandom()
+ */