mmyoji

Day.js の仕様

dayjs(dateOrString) vs dayjs.tz(dateOrString)

• 公式 doc 的には .tz() の場合は dayjs.tz.setDefault(tz) が使われている場合、その tz で初期化されるとある
  • https://day.js.org/docs/en/plugin/timezone#differences-to-moment
• Date を渡した場合は挙動に差は無さそう
• string を渡す場合は timezone 以前に dayjs.tz() の結果がおかしな挙動になる

mmyoji

import { newWebSocketRpcSession } from "capnweb";

import type { MyApi } from "./server.ts";

const api = newWebSocketRpcSession<MyApi>("ws://localhost:8080/api");

const result = await api.hello("World");

console.log(result);

mmyoji

services:
  db:
    image: mysql:8.0
    command: mysqld --character-set-server=utf8mb4 --collation-server=utf8mb4_0900_bin
    environment:
      - MYSQL_ALLOW_EMPTY_PASSWORD=yes
      - MYSQL_DATABASE=app_development
    ports:
      - "3306:3306"

mmyoji

import { Suspense, use } from 'react';

function Messages({ fetchMessages }: { fetchMessages: Promise<string[]> }) {
  // Promise must be initialized outside the component currently.
  // see: https://react.dev/blog/2024/12/05/react-19#new-feature-use
  //
  // This doesn't work;
  // ```
  //   const messages = use(new Promise<string[]>((resolve) => {
  //     setTimeout(() => {

mmyoji

/**
 * @example
 * ```ts
 * const POST_STATE = {
 *   DRAFT: 0,
 *   PUBLISHED: 1,
 *   // ...
 * } as const;
 * type PostState = (typeof POST_STATE)[keyof typeof POST_STATE];
 *

mmyoji

express.js official migration guide is not sufficient yet.

Regexp in route path cannot be used

• Check manually in your RequestHandler
• Be careful declaration order

// users.router.ts
import { Router } from "express";

mmyoji

import { assertEquals } from "jsr:@std/assert";

import { paginate } from "./pagination.ts";

Deno.test(function paginateTest() {
  assertEquals(paginate(1, 1), [1]);

  assertEquals(paginate(1, 2), [1, 2]);
  assertEquals(paginate(2, 2), [1, 2]);

mmyoji

#!/bin/bash

function print_multiline() {
    local text=$(cat <<'EOF'
```
# Markdown Text

- one
- two
```

mmyoji

timestamps: boolean behaviours on Sequelize (v5)

• MySQL v5.7
• sequelize@5.22.3

const { Sequelize, DataTypes, literal } = require("sequelize");

const sequelize = new Sequelize({/* ... */});

mmyoji

/**
 * ref: https://www.freecodecamp.org/news/javascript-range-create-an-array-of-numbers-with-the-from-method/
 *
 * # Example
 *
 * ```ts
 * import { range } from "./main.ts";
 *
 * range(1, 5);
 * // [1, 2, 3, 4, 5]