Lycolog

const tyof = (param?: string) => {
  return typeof param === 'undefined';
};

const undef = (param?: string) => {
  return param === undefined;
};

const tyStart = +new Date();
for (let i = 0; i < 10000000000; i++) {
  tyof();
}
console.log('typeof', +new Date() - tyStart);

const unStart = +new Date();
for (let i = 0; i < 10000000000; i++) {
  undef();
}
console.log('undefined', +new Date() - unStart);

"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
const tyof = (param)=>{
    return typeof param === 'undefined';
};
const undef = (param)=>{
    return param === undefined;
};
const tyStart = +new Date();
for(let i = 0; i < 10000000000; i++){
    tyof();
}
console.log('typeof', +new Date() - tyStart);
const unStart = +new Date();
for(let i = 0; i < 10000000000; i++){
    undef();
}
console.log('undefined', +new Date() - unStart);

(() => {
  const undefined = 123;
  const hoge = undefined;

  if (typeof hoge === 'undefined') {
    console.log('hoge is undefined');
  } else {
    console.log('hoge is not undefined');
  }
})();

<!-- 入力値 -->
漢字
Alphabetsひらがな12345カタカナ67890

<!-- Prettier 2.8 -->
漢字 Alphabets ひらがな 12345 カタカナ 67890

<!-- Prettier 3.0 -->
漢字Alphabetsひらがな12345カタカナ67890

<!-- Prettier 2.8 -->
module.exports = {
  // ...
}

<!-- Prettier 3.0 -->
export default {
  // ...
};

<!-- 入力値 -->
function HelloWorld(greeting = "hello", greeted = '"World"', silent = false, onMouseOver) {
}

<!-- trailingComma: es5 -->
function HelloWorld(
  greeting = "hello",
  greeted = '"World"',
  silent = false,
  onMouseOver // カンマが入らない
) {}

<!-- trailingComma: all -->
function HelloWorld(
  greeting = "hello",
  greeted = '"World"',
  silent = false,
  onMouseOver, // カンマが入る
) {}

server {
  listen       80;
  client_max_body_size 100m;
  server_name  mock-server.test;
  access_log   /var/log/nginx/mock-server.access.log;
  error_log    /var/log/nginx/mock-server.error.log;


  location ~ ^/.*$ {
    rewrite ^/.*$ / break;
    # リクエストパスの確認用
    proxy_set_header X-Request-Path $request_uri;
    proxy_pass  http://127.0.0.1:8888;
  }
}

<?php

$server_json = json_encode($_SERVER);

file_put_contents('log', "$server_json\n", FILE_APPEND);

<?php

$ignoreKeys = [
    'DOCUMENT_ROOT',
    'REMOTE_ADDR',
    'REMOTE_PORT',
    'SERVER_SOFTWARE',
    'SERVER_PROTOCOL',
    'SERVER_NAME',
    'SERVER_PORT',
    'REQUEST_URI',
    'SCRIPT_NAME',
    'SCRIPT_FILENAME',
    'PHP_SELF',
    'HTTP_HOST',
    'HTTP_CONNECTION',
    'HTTP_UPGRADE_INSECURE_REQUESTS',
    'HTTP_USER_AGENT',
    'HTTP_ACCEPT',
    'HTTP_ACCEPT_ENCODING',
    'HTTP_ACCEPT_LANGUAGE',
    'HTTP_CACHE_CONTROL',
    'REQUEST_TIME_FLOAT',
    'REQUEST_TIME'
];

$buff = array_filter($_SERVER, function($key) use($ignoreKeys) {
    return !in_array($key, $ignoreKeys);
}, ARRAY_FILTER_USE_KEY);

$server_json = json_encode($buff);

file_put_contents('log', "$server_json\n", FILE_APPEND);

npm i @storybook/xxx@latest && @storybook/yyy@latest ...

  export const Example: Story = {
-   storyName: 'ほげほげ',
+   name: 'ほげほげ',
  }

ModuleBuildError: Module build failed (from ./node_modules/sass-loader/dist/cjs.js):
SassError: expected "{".
  ╷
2 │       import API from "!../../../node_modules/style-loader/dist/runtime/injectStylesIntoStyleTag.js";

  module.exports = {
    stories: ['../src/**/*.stories.@(js|jsx|ts|tsx)'],
    addons: [
      '@storybook/addon-links',
      '@storybook/addon-essentials',
-     '@storybook/preset-scss',
    ],
    framework: {
      name: '@storybook/nextjs',
      options: {},
    },
    docs: {
      autodocs: true,
    },
  };

npm un @storybook/preset-scss

// 分割代入
const foo = ({ id, name }) => {
  id = 2;
  name = 'aaaa';
  console.log(id, name);
};

// スプレッド代入
const bar = ({ ...props }) => {
  props.id = 2;
  props.name = 'aaaa';
  console.log(props.id, props.name);
};

// オブジェクト代入
const baz = (props) => {
  props.id = 2;
  props.name = 'aaaa';
  console.log(props.id, props.name);
};

// オブジェクト再代入
const hoge = ({ id, name, dat }) => {
  id = 2;
  name = 'aaaa';
  dat = {
    value: 3,
  };
  console.log(id, name, dat);
};

// オブジェクト書き換え
const piyo = ({ id, name, dat }) => {
  id = 2;
  name = 'aaaa';
  dat.value = 3;
  console.log(id, name, dat);
};


const test1 = { id: 1, name: 'test' };
const test2 = { id: 1, name: 'test' };
const test3 = { id: 1, name: 'test' };
const test4 = { id: 1, name: 'test', dat: { value: 1 } };
const test5 = { id: 1, name: 'test', dat: { value: 1 } };


foo(test1);
console.log(test1);

bar(test2);
console.log(test2);

baz(test3);
console.log(test3);

hoge(test4);
console.log(test4);

piyo(test5);
console.log(test5);

// 分割代入では呼び出し元が影響を受けていない
2 'aaaa'
{id: 1, name: 'test'}

// スプレッド代入では呼び出し元が影響を受けていない
2 'aaaa'
{id: 1, name: 'test'}

// オブジェクト代入では呼び出し元が影響を受ける
2 'aaaa'
{id: 2, name: 'aaaa'}

// オブジェクト再代入では呼び出し元が影響を受けていない
2 'aaaa' {value: 3}
{id: 1, name: 'test', dat: { value: 1}}

// オブジェクト書き換えでは呼び出し元が影響を受ける
2 'aaaa' {value: 3}
{id: 1, name: 'test', dat: { value: 3}}