1 files changed, 8 insertions, 2 deletions
diff --git a/Timeline/ClientApp/src/app/utilities/language-untilities.ts b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
index be9df2dc..94434665 100644
--- a/Timeline/ClientApp/src/app/utilities/language-untilities.ts
+++ b/Timeline/ClientApp/src/app/utilities/language-untilities.ts
@@ -3,10 +3,16 @@ export function nullIfUndefined<T>(value: T | undefined): T | null {
 }
 
 export function throwIfNullOrUndefined<T>(value: T | null | undefined,
-  lazyMessage: () => string = () => 'Value mustn\'t be falsy'): T | never {
+  message: string | (() => string) = 'Value mustn\'t be null or undefined'): T | never {
   if (value === null || value === undefined) {
-    throw new Error(lazyMessage());
+    throw new Error(typeof message === 'string' ? message : message());
   } else {
     return value;
   }
 }
+
+export function repeat(time: number, action: (index?: number) => void) {
+  for (let i = 0; i < time; i++) {
+    action(i);
+  }
+}