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You-wei Teng youweit

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youweit / gist:6594204
Created September 17, 2013 13:20
256 bit key generate example
import random
import hashlib
import base64
base64.b64encode(hashlib.sha256( str(random.getrandbits(256)) ).digest(), random.choice(['rA','aZ','gQ','hH','hG','aR','DD'])).rstrip('==')
@youweit
youweit / appendLog.java
Created January 26, 2014 07:06
android log to file, will create a log file in sdcard root directory.
public void appendLog(String text) {
String logFileName = "AppLog.txt";
SimpleDateFormat sdf = new SimpleDateFormat("MM-dd HH:mm:ss", Locale.getDefault());
String currentDateandTime = sdf.format(new Date());
File logFile = new File(Environment.getExternalStorageDirectory()
+ "/" + logFileName);
if (!logFile.exists()) {
try {
logFile.createNewFile();
@youweit
youweit / gist:7893622
Created December 10, 2013 16:36
public static int parseColor(String colorString) {
if (colorString.charAt(0) == '#') {
// Use a long to avoid rollovers on #ffXXXXXX
long color = Long.parseLong(colorString.substring(1), 16);
if (colorString.length() == 7) {
// Set the alpha value
color |= 0x00000000ff000000;
} else if (colorString.length() != 9) {
throw new IllegalArgumentException("Unknown color");
}
@youweit
youweit / gist:7869338
Last active December 30, 2015 18:39
public class DiscoveryThread implements Runnable {
private static String TAG = "DiscoveryThread";
private DatagramSocket c;
pirvate static Context mContext;
private static int PORT = 5549;
@Override
public void run() {
byte[] bytes = null;
ByteArrayOutputStream baos = new ByteArrayOutputStream();
@youweit
youweit / LinkedList.h
Created November 17, 2013 12:52
Linkedlist
/*
* DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
* Version 2, December 2004
*
* Copyright(C) 2013 You-wei Teng
*
* Everyone is permitted to copy and distribute verbatim or modified
* copies of this license document, and changing it is allowed as long
* as the name is changed.
*
@youweit
youweit / gist:7306258
Last active December 27, 2015 09:49
Quick sort
//Call with [self quickSort:0 withHigh:[scanpleFileList count]-1];
-(void)quickSort:(int)low withHigh:(int)high;{
int i = low,j = high;
int pivot = [[[scanpleFileList objectAtIndex:(low+high)/2]time]intValue];
while(i <= j){
while([[[scanpleFileList objectAtIndex:i]time]intValue] < pivot) i++;
@youweit
youweit / AndroidManifext.xml
Created October 27, 2013 03:55 — forked from komamitsu/AndroidManifext.xml
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
@youweit
youweit / gist:6878683
Last active December 24, 2015 23:18
Arduino breath led!
#include <math.h>
void setup()
{
pinMode(11, OUTPUT);
}
void loop()
{
float val = (exp(sin(millis()/2000.0*PI)) - 0.365)*100.0;
@youweit
youweit / gist:6710109
Created September 26, 2013 05:11 — forked from evadne/gist:4544569
//
// StickyHeaderLayout.h
// Wombat
//
// Created by Todd Laney on 1/9/13.
// Copyright (c) 2013 ToddLa. All rights reserved.
//
// Modified from http://blog.radi.ws/post/32905838158/sticky-headers-for-uicollectionview-using THANKS!
//
@youweit
youweit / gist:6228826
Created August 14, 2013 07:51
<!doctype html>
<html>
<head>
<script src='//code.jquery.com/jquery-1.7.2.min.js'></script>
<script src="//localhost:3000/socket.io/socket.io.js" type="text/javascript"></script>
<script>
var socket = io.connect('//localhost:3000');
socket.on('welcome', function(data) {
$('#messages').append('<li>' + data.message + '</li>');