Kotlin - Completed Series and Rotational Cipher

kotlin/rotational-cipher/src/main/kotlin/RotationalCipher.kt

@@ -0,0 +1,23 @@
+class RotationalCipher(val cipher: Int) {
+    fun encode(inpString: String): String {
+        return inpString.map { it.encode(cipher) }.joinToString(separator = "")
+    }
+}
+
+fun Char.encode(amount: Int): Char{
+    if (this.isUpperCase()){
+        val temp = this + amount
+        if (!temp.isUpperCase()){
+            return temp - 26
+        }
+        else return temp
+    }
+    else if (this.isLowerCase()){
+        val temp = this + amount
+        if (!temp.isLowerCase()){
+            return temp - 26
+        }
+        else return temp
+    }
+    else {return this}
+}

kotlin/series/src/main/kotlin/Series.kt

@@ -0,0 +1,16 @@
+class Series {
+    companion object {
+        fun slices(length: Int, inpString: String): List<List<Int>>{
+            val returnList = mutableListOf<MutableList<Int>>()
+            for (i in 0..inpString.length-length){
+                val tempList = mutableListOf<Int>()
+                for (j in i..i+length - 1){
+                    tempList.add(inpString[j].toInt() - 48)
+                }
+                returnList.add(tempList)
+            }
+
+            return returnList
+        }
+    }
+}