evaisse’s gists

evaisse / the_problem_with_dynamic.dart

Created September 13, 2024 14:17

The problem with `dynamic` in dart

	void main() {

	dynamic myDynamicValue = null;

	myDynamicValue.length;

	Object? myTypedValue = myDynamicValue;

	myTypedValue.length; // that's helpful

evaisse / typed_generics.dart

Last active September 13, 2024 12:01

Show how extends at least `Object` allow to forbid passing dynamic generics

	class Generic<T> {
	final T that;
	Generic(this.that);
	}

	class TypedGeneric<T extends Object> {
	final T that;
	TypedGeneric(this.that);
	}

evaisse / castor_safe_try_as.dart

Last active September 13, 2024 10:32

cast0r — Safe try/as and transform extension that works on any object for Dart

	/// Cast Or provide default value (optional or safely defaulted)
	/// by the way, "castor" is the french word for beaver...
	/// ```
	/// ___
	/// /. .\
	/// =\_t_/=
	/// [\|]
	/// ```
	///
	extension CastOrExtension<T extends Object> on T {

evaisse / problem_with_dart_constructors_and_default_values.dart

Last active September 12, 2024 15:43

	class Cool {
	final int count;
	Cool({ int? count = 20 }): this.count = count ?? 20;
	}

	class NotCool {
	final int count;
	NotCool({ this.count = 20 });
	}

evaisse / pocketbase_csv_import_export.js

Created September 4, 2024 12:41

Basic javascript plugin to import/export into your PocketBase admin UI


	console.log('coucouc');

evaisse / enum_generics_inferance.dart

Last active August 30, 2024 13:37

Dart ssmple to explain Enum with generics inference

	enum ManyGenerics<T> {
	myInt<int>(defaultValue: 3),
	myString<String>(defaultValue: 'hello');

	final T defaultValue;

	const ManyGenerics({required this.defaultValue});
	}

	typedef WrappedAccess = ({ManyGenerics val});

evaisse / sealed_state_example.dart

Created July 25, 2024 13:07

dart sealed class and unstructuring of switch case in pattern matching

evaisse / main.dart

Last active June 19, 2024 12:15

Example of ValueNotifier & ValueListenerBuilder to replace Rx from Getx.

	import 'package:flutter/material.dart';

	///
	/// @see https://api.flutter.dev/flutter/widgets/ValueListenableBuilder-class.html
	/// @see https://api.flutter.dev/flutter/foundation/ValueNotifier-class.html
	///
	ValueNotifier<int> counter = ValueNotifier<int>(0);

	void main() {
	runApp(const MyApp());

evaisse / dart_generic_inheritance.dart

Last active April 26, 2022 16:04

Describe how to implement a twin generics inheritance with dart

	///
	/// @see https://dartpad.dev/660a4ec4fcb91ff648a632705ea4697a
	///
	import 'package:flutter_test/flutter_test.dart';

	/// base controller, just to explain the main inheritance
	class BaseController {}

	class BaseScreen<T extends BaseController> {
	late final T controller;

evaisse / log4jscan.py

Last active January 25, 2022 18:57

A log4j version scan over a given path.

	#!/usr/bin/python
	"""

	sudo python3 log4jscan.py evaisse -d /System/Volumes/Data/Applications/Transporter.app/Contents/itms/share

	Output stuff like this :

	Script version: 2.1 (scans jar/war/ear/zip files)
	Start scanning on "/System/Volumes/Data/Applications/Transporter.app/"
	========================================================================

Emmanuel Vaïsse evaisse