Songwon Park magichim

Emacs Commands

Text

C-f: move cursor forward one char
C-b: mover cursor back one chart
C-n: mover cursor to next line
C-p: go to previous line
M-f: forward one word
M-b: move backward one word

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Prolog

Google Chrome Developers says:

The new WOFF 2.0 Web Font compression format offers a 30% average gain over WOFF 1.0 (up to 50%+ in some cases). WOFF 2.0 is available since Chrome 36 and Opera 23.

Some examples of file size differences: WOFF vs. WOFF2

TTF to WOFF2 converting

http://www.fontsquirrel.com/tools/webfont-generator

Observables

You don't really need a framework or fancy cutting-edge JavaScript features to do two-way data binding. Let's start basic - first and foremost, you need a way to tell when data changes. Traditionally, this is done via an Observer pattern, but a full-blown implementation of that is a little clunky for nice, lightweight JavaScript. So, if native getters/setters are out, the only mechanism we have are accessors:

var n = 5;
function getN() { return n; }
function setN(newN) { n = newN; }

console.log(getN()); // 5

setN(10);

Remove MySQL completely

Open the Terminal
Use mysqldump to backup your databases
Check for MySQL processes with: ps -ax | grep mysql
Stop and kill any MySQL processes
Analyze MySQL on HomeBrew:
```
brew remove mysql
```

한글과 유니코드

유니코드에서 한글을 어떻게 다루는지를 정리하였다.

유니코드

유니코드(Unicode)는 전 세계의 모든 문자를 컴퓨터에서 일관되게 표현하고 다룰 수 있도록 설계된 산업 표준 (위키 백과)
단순히 문자마다 번호를 붙임
계속 업데이트되며 현재는 Unicode Version 9.0.0 이 최신이다.

UTF

유니코드를 실제 파일 등에 어떻게 기록할 것인지를 표준화한 것이다.

	[user]
	name = Pavan Kumar Sunkara
	email = [email protected]
	username = pksunkara
	[init]
	defaultBranch = master
	[core]
	editor = nvim
	whitespace = fix,-indent-with-non-tab,trailing-space,cr-at-eol
	pager = delta

	var degrees2meters = function(lon,lat) {
	var x = lon * 20037508.34 / 180;
	var y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
	y = y * 20037508.34 / 180;
	return [x, y]
	}
	//test
	lon= -77.035974
	lat = 38.898717

	import UIKit
	import AVFoundation

	class ViewController: UIViewController, AVCaptureMetadataOutputObjectsDelegate {

	@IBOutlet weak var myView: UIView!

	var session: AVCaptureSession?
	var device: AVCaptureDevice?
	var input: AVCaptureDeviceInput?

	// Updated example from http://rosettacode.org/wiki/Hello_world/Web_server#Rust
	// to work with Rust 1.0 beta

	use std::net::{TcpStream, TcpListener};
	use std::io::{Read, Write};
	use std::thread;


	fn handle_read(mut stream: &TcpStream) {
	let mut buf = [0u8 ;4096];