Backend/생활코딩

[생활코딩 Nodejs] 25강~27강 정리(함수로 코드 압축화하기)

jellylucy 2021. 2. 15. 21:06

25강 JavaScript 함수

function f123(){
  console.log(1);
  console.log(2);
  console.log(3);
  console.log(4);
}
f123();
console.log('A');
console.log('Z');
console.log('B');
f123();
console.log('F');
console.log('C');
console.log('P');
console.log('J');
f123();
console.log('U');
console.log('A');
console.log('Z');
console.log('J');
console.log('I');
f123();
 
function f123(){
  console.log(1);
  console.log(2);
  console.log(3);
  console.log(4);
}

26강 JavaScript 함수 입력

console.log(Math.round(1.6)); //2
console.log(Math.round(1.4)); //1
 
function sum(first, second){ // parameter
  console.log(first+second);
}
 
sum(2,4); // argument

27강 JavaScript 함수 출력

console.log(Math.round(1.6)); //2
console.log(Math.round(1.4)); //1
 
function sum(first, second){ // parameter
  return first+second;
}
 
console.log(sum(2,4)); // argument

28강 함수로 코드 압축하기 

var http = require('http');
var fs = require('fs');
var url = require('url');
 
function templateHTML(title, list, body){
  return `
  <!doctype html>
  <html>
  <head>
    <title>WEB1 - ${title}</title>
    <meta charset="utf-8">
  </head>
  <body>
    <h1><a href="/">WEB</a></h1>
    ${list}
    ${body}
  </body>
  </html>
  `;
}
function templateList(filelist){
  var list = '<ul>';
  var i = 0;
  while(i < filelist.length){
    list = list + `<li><a href="/?id=${filelist[i]}">${filelist[i]}</a></li>`;
    i = i + 1;
  }
  list = list+'</ul>';
  return list;
}
 
var app = http.createServer(function(request,response){
    var _url = request.url;
    var queryData = url.parse(_url, true).query;
    var pathname = url.parse(_url, true).pathname;
    if(pathname === '/'){
      if(queryData.id === undefined){
        fs.readdir('./data', function(error, filelist){
          var title = 'Welcome';
          var description = 'Hello, Node.js';
          var list = templateList(filelist);
          var template = templateHTML(title, list, `<h2>${title}</h2>${description}`);
          response.writeHead(200);
          response.end(template);
        })
      } else {
        fs.readdir('./data', function(error, filelist){
          fs.readFile(`data/${queryData.id}`, 'utf8', function(err, description){
            var title = queryData.id;
            var list = templateList(filelist);
            var template = templateHTML(title, list, `<h2>${title}</h2>${description}`);
            response.writeHead(200);
            response.end(template);
          });
        });
      }
    } else {
      response.writeHead(404);
      response.end('Not found');
    }
 
 
 
});
app.listen(3000);
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