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NodeJS 6-15

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NodeJS  |  6

Microprocessor (a tiny machine)
- Machine Code (Language) : Programming Languages spoken by Computer Processors

Level Of Abstraction
-Machine Language
-Assembly Language
-C/C++
-JavaScript

Node is written in C++
V8 is written in C++

NodeJS  |  7

ECMAScript:
The Standard Javscript is based on

A Javascipt Engine:
A Program that converts Javascript code into something the Computer processor can understand.
And it should follow the ECMAScript standard on how the language should work and what features it should have.

NodeJS  |  8

V8 Under the Hood

can convert Javascript to any machine languages

NodeJS  |  9

Adding Features to Javascript

-V8 can run standalone, or can be embedded into any C++ application

Javascript Code —> V8(C++) —> Machine Code

Javascript Code —> My C++ Program (V8(C++)) —> Machine Code

Node.js is a C++ Programme with V8 embedded
that has added a wealth of great features
that make it suitable to be a server technology.

NodeJS  |  10

Severs and Clients Node.js : Server technology designed to be able to use Javascript to write server code -Server: performs services (Response to Client) -Client: asks for services (Request to Server) :Both use Standard Format (Request & Response) -Web Server -Browser : Both use HTTP (Request & Response)

NodeJS  |  11

What does Javascript need To manage a Server?

-Better ways to organize our code into reusable pieces
-Ways to deal with files
-Ways to deal with databases
-The ability to communicate over the internet
-The ability to accept requests and send responses (in the standard format)
-A way to deal with work that takes a long time

Javascript  |  45

IIFE and Safe Code

IIFE : Immediately Invoked Function Expression

var greeting = ‘Hola’;

( function (name) {
var greeting = ‘Hello’;
console.log(greeting + ‘ ‘ + name);
}(name) );

Execution Context | [greeting’Hello’]

Global Execution Context | [ greeting:
‘Hola’ ]

:Stored in separated execution memory

To make sure not colliding with other code
when you’re creating something reusable

-Pass the Reference to Global object
( function (global, name) {
var greeting = ‘Hello’;
console.log(greeting + ‘ ‘ + name);
}(window, name) );

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바디필로우 커버씌우기...힘들었다

Squat 40

Burpee 20

순간접착제 사오기

다이소에 목공접착제밖에 안팔아서 그냥 사오긴했는데..일단 붙여놨으니 10분뒤 결과를 봅시다.

음 그리고 어제 시켜먹은 치킨집이 걸어서 1분거리였다는 사실을 알게됐어여. 하하

어제 하루종일 컴터만 하니 진이 빠지더라구요. 그래서 오늘은 일정시간마다 바깥공기를 1분씩이라도 마시고 들어오려구요.

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