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Vej vejuhust

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  • Beijing, China
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@vejuhust
vejuhust / rdtsc.c
Created October 5, 2012 06:03
Read Time Stamp Counter from Intel x86 CPU
#include <stdio.h>
int main (int argc, const char * argv[]) {
unsigned int hi;
unsigned int lo;
long double result;
/* Set *hi and *lo to the high and low order bits of the cycle counter.
Implementation requires assembly code to use the rdtsc instruction. */
asm("rdtsc; movl %%edx,%0; movl %%eax,%1" /* Read cycle counter */
@vejuhust
vejuhust / json_test.php
Last active December 14, 2015 07:09
a json testing controller in CodeIgniter.
<?php
class Json_test extends Controller {
public function setter() {
$fp = fopen("/tmp/json_test.txt","w");
$content = json_encode($_POST);
fwrite($fp, $content, strlen($content));
fclose($fp);
echo $content;
}
@vejuhust
vejuhust / printallccode.sh
Last active December 15, 2015 09:19
print all c code in this folder
#!/bin/sh
TARGETFILE=allinone.c
if [ -e "$TARGETFILE" ]; then
rm -f "$TARGETFILE"
fi
if [ -n "$1" ]; then
printf "$1""\n" >> "$TARGETFILE"
@vejuhust
vejuhust / listdate.py
Created January 5, 2014 09:28
List past 20 days
#!/usr/bin/env python
# -*- coding:utf-8 -*-
from datetime import datetime
from datetime import timedelta
now = datetime.now()
delta_day = timedelta(days = -1)
for i in range(21):
now += delta_day
@vejuhust
vejuhust / estimated.py
Created January 9, 2014 15:31
In Agile development, we usually use hours to estimate our projects, and it's not easy to make it accurate. This little tool might be useful to you.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import random
x = int(raw_input("how many work items do you have? "))
hours = [4,6,6,8,8,8,8,10,10,12,14]
for i in range(x):
print random.choice(hours)
@vejuhust
vejuhust / combine.sh
Last active August 29, 2015 14:02
using imagemagick to append bottom parts of other images to the first one
#!/bin/bash
if [ $# -lt 1 ]; then
percent=13
printf "percent missing: using default value "$percent" %% \n"
else
percent=$1
fi
type=png
@vejuhust
vejuhust / xyfm_setup.md
Last active August 29, 2015 14:05
@vejuhust
vejuhust / lapse_maker.md
Last active May 25, 2020 13:12

ffmpeg

install

apt-add-repository ppa:jon-severinsson/ffmpeg
apt-get update
apt-get install ffmpeg

generate silent film




  


  




    


          
    

      

        
        

          

              @vejuhust
          

          

            
                vejuhust
                / raspi-buy
            
            

              Created
              September 25, 2014 16:41
            

              
                Shopping List for Raspberry Pi B+
              
          

        

      

        

  

    
    


        



  


  

        

          
          Raspberry Pi
        

        

          
          http://item.taobao.com/item.htm?spm=a1z09.2.9.10.MbZ8cB&id=38987175483&_u=p30n4aoe69b
        

        

          
          

        

        

          
          Shell
        

        

          
          http://item.taobao.com/item.htm?spm=a1z09.2.9.40.MbZ8cB&id=40236827770&_u=p30n4ao46eb
        

        

          
          

        

        

          
          Heat sink
        

        

          
          http://item.taobao.com/item.htm?spm=a1z09.2.9.30.MbZ8cB&id=40272781292&_u=p30n4aoa8ab
        

        

          
          

        

        

          
          Camera wire
        

  





    


  




    


          
    

      

        
        

          

              @vejuhust
          

          

            
                vejuhust
                / vej_bash_alias.sh
            
            

              Created
              February 13, 2015 12:54
            

              
                # Also write this to .bashrc if it doesn’t contain if [ -f ~/.bash_aliases ]; then . ~/.bash_aliases fi
              
          

        

      

        

  

    
    


        



  


  

        

          
          function gp() {
        

        

          
              if [ $# -eq 0 ];
        

        

          
              then
        

        

          
                  count=10
        

        

          
              else
        

        

          
                  count=$1
        

        

          
              fi
        

        

          
              cat /dev/urandom | tr -dc "a-zA-Z0-9" | fold -w 16 | head -n $count
        

        

          
          }