[iOS] UIScrollView

About ScrollView Programming
ScrollViewSuite
UIScrollview getting touch events
example

[Linux] Shell Script check value enable/disable

#!/bin/sh
CHECK_FILE="/var/value_check"
CHECK_ENABLE=`cat $CHECK_FILE`
echo "CHECK_ENABLE=$CHECK_ENABLE"
if [ -f $CHECK_FILE -a -n $CHECK_ENABLE ]; then
        if [ $CHECK_ENABLE -eq 1 ]; then
                echo "enable";
        else
                echo "disable 1";
        fi
else
        echo "disable 2";
fi


[Linux] Shell Script

An Introduction to Shell Script
Advanced Bash-Scripting Guide

Using Named Pipes (FIFOs)

[iOS] UIImageView Rotate

Reference 1
Reference 2
Reference 3
Reference 4

[iOS] UIImageView Animation

reference 1
reference 2

UIView Animation
Using UITouch inside a UIScrollView
Touches Example

[C++] static data member

reference

public static data member: for all object class, fetch by Class::member name, init before function declare.
private static data member: for class only, direct fetch, use it inter class is OK

[Linux] CUPS

CUPS
鳥哥的 Linux 私房菜
Printer support List