AlexVegner

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AlexVegner / cmd

Last active March 21, 2023 16:10

Catch message from iframe

	python3 -m http.server 8080

	python3 -m http.server 8081

AlexVegner / email_ regex.dart

Last active March 15, 2021 11:40

rfc 5322 official standard email regex

	// The Official Standard: RFC 5322
	final emailRegexp = RegExp(
	r"^[a-zA-Z0-9.!#$%&'+/=?^_`{\|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,253}[a-zA-Z0-9])?)$");

	void main() {
	[
	'[email protected]',
	'[email protected]',
	'[email protected]',
	'@3.gmail.com',

AlexVegner / datetime.dart

Created July 30, 2020 08:27

Dart utc time

	void main() {
	var now = DateTime.now();
	print(now.toUtc());
	}

AlexVegner / dart_generator.dart

Created January 24, 2020 18:27

dart_generator.dart

	import 'dart:async';

	main() async {
	print(naturalsTo(10).toList());
	print(await asynchronousNaturalsTo(10).toList());
	print(naturalsDownFrom(10).toList());
	print(await periodicGenerator(10).toList());
	}

	Iterable<int> naturalsTo(int n) sync* {

AlexVegner / dart_stream.dart

Last active January 24, 2020 19:00

dart_stream.dart

	import 'dart:async';

	main() async {
	await periodicStreamSample();
	// await streamControllerSample();
	// await streamControllerWithPeriodicEmitsAndWaiterSample();
	}

	Future<void> periodicStreamSample() async {
	final subscription = Stream.periodic(

AlexVegner / dart_future.dart

Created January 24, 2020 17:26

dart_future.dart

	import 'dart:async';

	main() async {
	//final version = -1;
	//final version = 0;
	final version = 1;

	// use then / catchError
	print('handle with then-catchError');
	checkVersion(version)

AlexVegner / dart_generic.dart

Created January 24, 2020 15:38

dart_generic.dart

	abstract class Cache<T> {
	T getByKey(String key);
	void setByKey(String key, T value);
	}

	class StringCashe extends Cache<String> {
	var _cache = Map<String, String>();
	@override
	String getByKey(String key) {
	return _cache[key];

AlexVegner / dart_extension.dart

Created January 24, 2020 13:46

dart_extension.dart

	/// Example 1
	/// Enum extension
	enum NetworkState {
	unknown,
	connected,
	disconnected,
	}

	/// NetworkStateExtension
	extension NetworkStateExt on NetworkState {

AlexVegner / dart_class.dart

Created January 24, 2020 13:12

dart_class.dart

	/// class
	class Pesron {
	String name; // field
	int age;

	String description() {
	// method
	return '$name, age: $age';
	}
	}

AlexVegner / dart_exceptions.dart

Created January 24, 2020 09:51

dart_exceptions.dart

	import 'dart:math' as math;

	class MyError extends Error {}

	class MyException implements Exception {
	MyException([dynamic message]);
	}

	void checkValue(int value) {
	switch(value) {

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