New: Custom Filtering for UI (#234)

frontend/src/Utilities/Array/getIndexOfFirstCharacter.js

@@ -0,0 +1,13 @@
+import _ from 'lodash';
+
+export default function getIndexOfFirstCharacter(items, character) {
+  return _.findIndex(items, (item) => {
+    const firstCharacter = item.sortTitle.charAt(0);
+
+    if (character === '#') {
+      return !isNaN(firstCharacter);
+    }
+
+    return firstCharacter === character;
+  });
+}