nitaking

class User {
  final int id;
  final String name;
  
  const User({
    required this.id,
    required this.name,
  });
}
  

nitaking

enum Animal {
  Cat,
  Dog,
}

hello(Animal animal) {
  return switch (animal) {
      Animal.Cat => 'is Cat',
      Animal.Dog => 'is Dog',
  };

nitaking

import 'dart:async';

import 'package:hooks_riverpod/hooks_riverpod.dart';

extension AutoDisposeRefCache on AutoDisposeRef {
  static final Map<String, Timer> _timersMap = {};

  // Keeps the provider alive for [duration] since when it was first created
  void cacheFor(Duration duration, {String? cacheKey}) {
    if (cacheKey != null && _timersMap.containsKey(cacheKey)) {

nitaking

import 'dart:async';

import 'package:hooks_riverpod/hooks_riverpod.dart';

extension AutoDisposeRefCache on AutoDisposeRef {
  static final Map<String, Timer> _timersMap = {};

  // Keeps the provider alive for [duration] since when it was first created
  void cacheFor(Duration duration, {String? cacheKey}) {
    if (cacheKey != null && _timersMap.containsKey(cacheKey)) {

nitaking

const isSSR = () => typeof window === 'undefined';

nitaking

const UserScheme = z.object({
  name: z.string().nonempty().max(50),
  age: z.number().min(1).max(200),
});

type Values = z.infer<typeof UserScheme>;
type Forms = {
  setName: (value: string) => void;
  setAge: (value: number) => void;
  valid: boolean;

nitaking

select id,
       start_at,
#        date_add(start_at, interval -DAY(start_at) + 1 DAY),
       end_at
from sample_data;

# [
#   {
#     "id": 1,
#     "start_at": "2022-04-01 20:57:07",

nitaking

import { useEffect } from 'react';

/**
 * ブラウザバックしたときに処理を実行したいときに使用するhooks
 */
export const useOnBrowserBack = (onBrowserBack: () => void) => {
  useEffect(() => {
    window.history.pushState(null, '', window.location.pathname);
    window.addEventListener('popstate', onBrowserBack);
    return () => {

nitaking

import { useEffect } from 'react';

/**
 * 一度入力した後にリロードすると、確認ダイアログを出す。
 */
export const useOnReloadAlert = () => {
  useEffect(() => {
    window.history.pushState(null, '', window.location.pathname);
    const onReload = (event: BeforeUnloadEvent) => {
      event.preventDefault();

nitaking

function chunk(arr, size) {
    return arr.reduce(
        (newarr, _, i) => (i % size ? newarr : [...newarr, arr.slice(i, i + size)]),
        []
    )
}