taiansu

module Main where

-- data, you can think this is something like {:user, name, age} in Elixir
data User = User String Int

foo (User "John" _) = 100
foo (User _ age) = age

-- tuple
bar (_, _, 3) = 100

taiansu

defmodule CodeLock do
  @behaviour :gen_statem

  @name :code_lock

  # Client API
  def start_link(code) do
    :gen_statem.start_link({:local, @name}, __MODULE__, code, [])
  end

taiansu

exFAT support on macOS seems to have some bugs because my external drives with exFAT formatting will randomly get corrupted.

Disk Utility is unable to repair this at first, but the fix is this:

1. Use diskutil list to find the right drive id.
2. You want the id under the IDENTIFIER column, it should look like disk1s1
3. Run sudo fsck_exfat -d <id from above>. eg sudo fsck_exfat -d disk1s3
4. -d is debug so you'll see all your files output as they're processed.
5. Answer YES if it gives you the prompt Main boot region needs to be updated. Yes/No?

taiansu

const webpack = require('webpack');
const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = (env, options) => ({
  optimization: {
    minimizer: [

taiansu

什麼是表達式: Expression

最後會回傳一個值 (包括 null) 的 JavaScript 語法

2 // 數字

1 + 1 // 數學運算

taiansu

#!/usr/bin/env bash
# remove this file whenever you don't need it. you need json package to execute the last part.
echo 'installing npm dependencies...'
npm i -s react react-dom prop-types react-hot-loader
echo 'installing npm devDependencies...'
npm i -D @babel/cli @babel/core @babel/plugin-syntax-dynamic-import @babel/preset-env @babel/preset-react babel-loader clean-webpack-plugin html-webpack-plugin webpack webpack-cli webpack-dev-server
echo 'add scripts to package.json...'

json -f package.json -I -e "this.scripts.start=\"webpack-dev-server --mode development --open\""
json -f package.json -I -e "this.scripts.build=\"webpack --mode production\""

taiansu

students = [
  {age: 18, first_name: "Shane", last_name: "Osbourne"},
  {age: 22, first_name: "John", last_name: "Doe"},
  {age: 12, first_name: "John", last_name: "Barker"},
  {age: 40, first_name: "Ben", last_name: "Haskell"},
  {age: 34, first_name: "Ben", last_name: "Barker"},
  {age: 9, first_name: "Shane", last_name: "Doe"},
  {age: 33, first_name: "Lee", last_name: "Ruby"}
]

taiansu

Sass versions of

• Bootstrap 4
• Fontawesome 5.5

with Elixir / Phoenix Framework 1.3 and 1.4 using Webpack 4 and Babel 7

taiansu

[
  {":0:unknown_function Function Access.get/3 does not exist."},
  {":0:unknown_function Function ArgumentError.exception/1 does not exist."},
  {":0:unknown_function Function Ecto.Adapters.Postgres.in_transaction?/1 does not exist."},
  {":0:unknown_function Function Ecto.Adapters.Postgres.rollback/2 does not exist."},
  {":0:unknown_function Function Ecto.Adapters.SQL.query/4 does not exist."},
  {":0:unknown_function Function Ecto.Adapters.SQL.query!/4 does not exist."},
  {":0:unknown_function Function Ecto.Adapters.SQL.to_sql/3 does not exist."},
  {":0:unknown_function Function Ecto.LogEntry.log/1 does not exist."},
  {":0:unknown_function Function Ecto.Repo.Preloader.preload/4 does not exist."},

taiansu

import Data.List (group, sort, sortOn)
import qualified Data.Map as M

encode :: Int -> String -> String
encode n = fmap (fetchChar . shift . fromEnum) where
  shift     = (+ n) . subtract 65
  fetchChar = (cycle ['A'..'Z'] !!)

decode :: String -> (String, Int)
decode str = fst . head $ sortOn snd matrix where