code-machina

package com.gbkim.student.dal.entities;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity

code-machina

create database projectdb

use projectdb

create table studenttab(
	id int PRIMARY KEY AUTO_INCREMENT,
    sname varchar(20),
    scourse varchar(30),
    sfee int
)

code-machina

package com.gbkim.student.dal;

import java.util.Optional;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

code-machina

# AWS 인스턴스를 실행
aws ec2 run-instances --instance-type [인스턴스 타입을 입력, t2.micro] --image-id [AMI 아이디를 입력, 인스턴스 정보] --count [생성할 인스턴스 수를 입력, 숫자]

# Topic : Create Custom AMI

## 권한 상승
sudo su
## 업데이트 
yum update -y
## 아파치 웹서버 설치

code-machina

pragma solidity ^0.5.1; // (1) Version pragma

contract Helloworld {
    // 문자열 멤버 변수
    string public greeting;
    
    // memory 키워드가 반드시 있어야 한다.
    // greeting 멤버 변수를 초기화
    function setGreeting(string memory _greeting) public {
        greeting = _greeting;

code-machina

# ethereum 마이닝이 진행 중인지 확인한다.

curl -X POST -H "Content-Type: application/json" --data '{"jsonrpc":"2.0", "method":"eth_mining","params":[], "id":10}' ${RPC_HOST}:8545
# output: {"jsonrpc":"2.0","id":10,"result":true}

code-machina

using System;

namespace DotNetDesignPatternDemos.SOLID.InterfaceSegregationPrinciple
{
  public class Document
  {
  }

  public interface IMachine
  {

code-machina

<!-- nuxt-link 를 사용하여 Navigate 와 Link 를 다룰 수 있음
to attribute : navigate 경로를 지정-->
<template>
  <section class="container">
    <nuxt-link to="/users">Users</nuxt-link>
  </section>
</template>

<script>
import Logo from '~/components/Logo.vue'

code-machina

wget https://gist.githubusercontent.com/code-machina/2ccfe2843bb8777394f7adf6bb8707d8/raw/1bd98178b34f02aa1d00b9e0c5a0821c3ac60ff6/genesis.json

code-machina

{
  "config": {
    "chainId": 33,
    "homesteadBlock": 0,
    "eip155Block": 0,
    "eip158Block": 0
  },
  "nonce": "0x0000000000000033",
  "timestamp": "0x0",
  "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",