Storages refactoring

src/storages/string-array/StringArrayStorage.ts

@@ -0,0 +1,20 @@
+import { ArrayStorage } from '../ArrayStorage';
+import { Utils } from '../../Utils';
+
+export class StringArrayStorage extends ArrayStorage <string> {
+    /**
+     * @param rotationValue
+     */
+    public rotateArray (rotationValue: number): void {
+        this.storage = Utils.arrayRotate(this.storage, rotationValue);
+    }
+
+    /**
+     * @returns {string}
+     */
+    public toString (): string {
+        return this.storage.map((value: string) => {
+            return `'${value}'`;
+        }).toString();
+    }
+}