KwangSeob Jeong lesstif

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.

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

	<?php

	// blahblah
	$app->singleton(
	Illuminate\Contracts\Debug\ExceptionHandler::class,
	App\Exceptions\Handler::class
	);

	//------------------ START HERE

	#!/bin/sh

	## svn project
	PRJS="test test2 test"

	## svn repository root
	SVN_ROOT=https://you-svn.examepl.com/svn/

	## git ignore list
	IGNORE="vim,java,maven,linux,eclipse,windows,intellij"

	#!/bin/bash

	export MYSQL_CNF=$(cat <<CNF
	# For advice on how to change settings please see
	# http://dev.mysql.com/doc/refman/5.6/en/server-configuration-defaults.html

	[mysqld]
	#
	# Remove leading # and set to the amount of RAM for the most important data
	# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.

	#!/bin/bash

	if [ "$(id -u)" != "0" ]; then
	echo "This script must be run as root." 1>&2
	exit 1
	fi

	##@see https://docs.docker.com/engine/admin/host_integration/

	SYSTEMD_DIR=/etc/systemd/system/

	#!/usr/bin/env bash

	SL=/etc/apt/sources.list

	PARAM="r:hm:dnak"

	KAKAO=mirror.kakao.com
	KAIST=ftp.kaist.ac.kr
	HARU=ftp.harukasan.org

	#!/bin/sh

	PHP_VER=7.3.21
	#PHP_VER=7.1.20
	FMT=.tar.xz

	MAJOR=`echo ${PHP_VER}\|awk -F. '{print $1}'`
	MINOR=`echo ${PHP_VER}\|awk -F. '{print $2}'`

	### download latest

	PASSWORD1 # Replace literal string 'PASSWORD1' with '*REMOVED*' (default)
	PASSWORD2==>examplePass # replace with 'examplePass' instead
	PASSWORD3==> # replace with the empty string
	regex:password=\w+==>password= # Replace, using a regex
	regex:\r(\n)==>$1 # Replace Windows newlines with Unix newlines