tweaks

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/utils/extension/file_ext.dart

@@ -11,7 +11,7 @@ extension FileSystemEntityExt on FileSystemEntity {
 extension DirectoryExt on Directory {
   Future<bool> lengthGte(int length) async {
     int count = 0;
-    await for (var _ in list()) {
+    await for (final _ in list()) {
       if (++count == length) return true;
     }
     return false;

lib/utils/extension/iterable_ext.dart

@@ -16,7 +16,7 @@ extension IterableExt<T> on Iterable<T> {
   }
 
   T? firstWhereOrNull(bool Function(T element) test) {
-    for (var element in this) {
+    for (final element in this) {
       if (test(element)) return element;
     }
     return null;

lib/utils/extension/num_ext.dart

@@ -18,7 +18,7 @@ extension IntExt on int? {
 
 extension DoubleExt on double {
   double toPrecision(int fractionDigits) {
-    var mod = pow(10, fractionDigits.toDouble()).toDouble();
+    final mod = pow(10, fractionDigits.toDouble()).toDouble();
     return ((this * mod).round().toDouble() / mod);
   }
 }