tweaks

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

lib/utils/extension/iterable_ext.dart

@@ -14,6 +14,13 @@ extension IterableExt<T> on Iterable<T> {
     }
     return value;
   }
+
+  T? firstWhereOrNull(bool Function(T element) test) {
+    for (var element in this) {
+      if (test(element)) return element;
+    }
+    return null;
+  }
 }
 
 extension ListExt<T> on List<T> {

lib/utils/extension/num_ext.dart

@@ -1,3 +1,5 @@
+import 'dart:math' show pow;
+
 import 'package:flutter/widgets.dart';
 
 extension ImageExtension on num {
@@ -13,3 +15,10 @@ extension IntExt on int? {
   int? operator +(int other) => this == null ? null : this! + other;
   int? operator -(int other) => this == null ? null : this! - other;
 }
+
+extension DoubleExt on double {
+  double toPrecision(int fractionDigits) {
+    var mod = pow(10, fractionDigits.toDouble()).toDouble();
+    return ((this * mod).round().toDouble() / mod);
+  }
+}