hungtatai

Tmux 快捷键 & 速查表

启动新会话：

tmux [new -s 会话名 -n 窗口名]

恢复会话：

tmux at [-t 会话名]

hungtatai

#include <functional>

namespace functional {
template <typename Function> struct function_traits;

template <typename ClassType, typename ReturnType, typename... Args>
struct function_traits<ReturnType(ClassType::*)(Args...) const> {
  using function = const std::function<ReturnType(Args...)>;
};

hungtatai

# Ask for the user password
# Script only works if sudo caches the password for a few minutes
sudo true

# Install kernel extra's to enable docker aufs support
# sudo apt-get -y install linux-image-extra-$(uname -r)

# Add Docker PPA and install latest version
# sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 36A1D7869245C8950F966E92D8576A8BA88D21E9
# sudo sh -c "echo deb https://get.docker.io/ubuntu docker main > /etc/apt/sources.list.d/docker.list"

hungtatai

How to update all packages on ubuntu?

sudo apt-get update        # Fetches the list of available updates
sudo apt-get upgrade       # Strictly upgrades the current packages
sudo apt-get dist-upgrade  # Installs updates (new ones)

or

hungtatai

SCRIPT_PATH=$(dirname $(readlink -f $0))

echo $SCRIPT_PATH

hungtatai

// Get Environment Variable from $FILE and Set to Current Environment
function ExtractEnv () {
        FILE_PATH=$1
        ITEM_NAME=$2
        VALUE=`cat $FILE_PATH | awk 'BEGIN{FS="="}{ if ($1 ~ /\s*'$ITEM_NAME'\s*/) print $0}' | sed 's/^\s*'$ITEM_NAME'\s*=\s*//'`
        eval "$ITEM_NAME='$VALUE'"
}

hungtatai

git config --global alias.co checkout
git config --global alias.ci commit
git config --global alias.st status
git config --global alias.br branch
git config --global alias.df diff
git config --global alias.cur "rev-parse --abbrev-ref HEAD" # get current branch

hungtatai

#include <stdio.h>
/*
如果要在 main 用 d ，那跟在 A 用 *a 或在 B 用 b 意思是一樣的
但如果要在 main 用 &d ，那跟在 B 用 &b 意思是不一樣的，切記要用 A 的 a 當做做法
*/
void A (int **a) {
    printf("A: *a: %p\n", *a);
    printf("A: a: %p\n", a);
}

hungtatai

<?php
// https://blog.ladsai.com/php-utf8-%E7%B0%A1%E7%B9%81%E8%BD%89%E6%8F%9B.html#more-141

function gb2312_to_big5($str)
{
  global $utf8_gb2312, $utf8_big5;

  $str_t = '';
  $len = strlen($str);
  $a = 0;

hungtatai

If a c-str is created dynamically (calloc/malloc), we can't get it's memory size dynamically in any way. :'(

http://stackoverflow.com/questions/419022/char-x256-vs-char-malloc256sizeofchar

#include <stdio.h>
#include <stdlib.h>

int main()
{