Preparing backend integration

front/src/helpers/ArrayHelper.ts

@@ -0,0 +1,10 @@
+export abstract class ArrayHelper {
+
+  public static contains(array : any[], element : any) : boolean {
+    return array.indexOf(element) > -1;
+  }
+
+  public static indexOf(array : any[], element : any) : number {
+    return array.indexOf(element);
+  }
+}