feat: corrected dummy column in overview and main page

frontend/src/lib/fn/array.ts

@@ -13,3 +13,22 @@ export const groupBy = <T, Key extends string | number | symbol>(
     acc[groupId].push(item);
     return acc;
   }, {} as Record<Key, T[]>);
+
+/**
+ * Given a list of items returns a new list with only
+ * unique items. Accepts an optional identity function
+ * to convert each item in the list to a comparable identity
+ * value
+ */
+export const unique = <T, K extends string | number | symbol>(
+  array: readonly T[],
+  toKey?: (item: T) => K
+): T[] => {
+  const valueMap = array.reduce((acc, item) => {
+    const key = toKey ? toKey(item) : (item as unknown as string | number | symbol);
+    if (acc[key]) return acc;
+    acc[key] = item;
+    return acc;
+  }, {} as Record<string | number | symbol, T>);
+  return Object.values(valueMap);
+};