franzwong

module Sample exposing (..)

import Html exposing (Html, input, button, div, text, program)
import Html.Events exposing (onInput, onClick)
import Http exposing (post, jsonBody)
import Json.Encode as Encode exposing (..)
import Json.Decode as Decode exposing (Decoder, int, string)
import Json.Decode.Pipeline exposing (decode, required)
import Debug exposing (log)

franzwong

sudo openssl req -x509 -nodes \
-days 365 \
-newkey rsa:2048 \
-keyout /etc/ssl/mydomain_com.key \
-out /etc/ssl/mydomain_com.crt \
-subj '/CN=mydomain.com'

franzwong

• Joe Celko's SQL for Smarties, 5th Edition

  Chapter 32.1 - Finding Subregions of Size (n)

• Finding the maximum contiguous sum in an array

franzwong

alias j10="export JAVA_HOME=`/usr/libexec/java_home -v 10`; java -version"
alias j9="export JAVA_HOME=`/usr/libexec/java_home -v 9`; java -version"
alias j8="export JAVA_HOME=`/usr/libexec/java_home -v 1.8`; java -version"
alias j7="export JAVA_HOME=`/usr/libexec/java_home -v 1.7`; java -version"

franzwong

Branches

Long life

• master
• dev

Short life

• Release branch

franzwong

Setup local development environment with docker

MySQL

Start MySQL docker

docker run --name local-mysql -d \
  -v <local data dir>:/var/lib/mysql \
 -e MYSQL_ROOT_PASSWORD= \

franzwong

Coding guideline

Coding recommendation

• Composition over inheritance
• Extract code to separate method instead of putting code comment
• Return early
• Don't ignore exception
• Avoid singleton pattern

franzwong

import io.vertx.core.Vertx
import io.vertx.core.json.Json
import io.vertx.ext.web.Router

data class Person(
        val name: String,
        val nationality: String
) {
}

franzwong

public class BinaryTreeNode<T> {

	private T value;
	private BinaryTreeNode<T> leftChild;
	private BinaryTreeNode<T> rightChild;

	public T getValue() {
		return value;
	}

franzwong

package main

import (
  "fmt"
  "math/rand"
  "time"
)

func Quicksort(elements []int, low int, high int) {
  if (high > low) {