mahata

spring:
  datasource:
    url: jdbc:postgresql://${POSTGRES_HOST:localhost}:${POSTGRES_PORT:54321}/${POSTGRES_DB:spring-db}
    username: ${POSTGRES_USER:spring-user}
    password: ${POSTGRES_PASSWORD:password}

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version: "3.9"

services:
  db:
    image: postgres:15.4-alpine3.18
    container_name: spring-db
    ports:
      - "54321:5432"
    environment:
      POSTGRES_USER: "spring-user"

mahata

参考資料

• Spring Boot 超入門

---

やること

• 2. Spring Boot とは
• 3. 実際に使ってみる

mahata

# CLOUD_IMG: This file was created/modified by the Cloud Image build process
# iptables configuration for Oracle Cloud Infrastructure

# See the Oracle-Provided Images section in the Oracle Cloud Infrastructure
# documentation for security impact of modifying or removing these rule

*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [463:49013]

mahata

#!/bin/sh -xe

# Source: http://kubernetes.io/docs/getting-started-guides/kubeadm

set -e

source /etc/lsb-release
if [ "$DISTRIB_RELEASE" != "20.04" ]; then
    echo "################################# "
    echo "############ WARNING ############ "

mahata

#!/usr/bin/env python3
import os
import sys
import textwrap
import urllib.request
import json
import random
from dataclasses import dataclass
from typing import List

mahata

function *createPrimeGenerator() {
  const primes = new Set<number>()

  let current = 2
  while (true) {
    while (true) {
      let isPrime = true
      for (const prime of primes) {
        if (current % prime === 0) {
          isPrime = false

mahata

// 本章で作った cat コマンドを改造して、コマンドライン引数でファイル名が渡されなかったら標準入力を読むようにしなさい。

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

static void do_cat(int fd, const char *s);

mahata

["A", "C"]
       ^
       cursor

mahata

import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        ArrayList<String> list = new ArrayList<>();
        list.add("A");
        list.add("B");
        list.add("C");
        list.add("D");
        list.add("E");