[+] Encapsulate findLastIndex()

src/logic/utils/general-utils.ts

@@ -0,0 +1,6 @@
+
+export function findLastIndex<T>(array: T[], callback: (v: T) => boolean): number
+{
+    let arr2 = array.slice().reverse();
+    return arr2.length - arr2.findIndex(callback);
+}