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RAW THINGS



25 Oct · Robert Eisele


HOW I'VE GOT NO NEW .DE DOMAIN

My fabulous attempt of getting no new 2-3 digit .de Domain. But I ended up with
a nice research on weighting good names.

14 Jul · Robert Eisele


TRACKBALL ROTATION USING QUATERNIONS

The Arcball or Trackball is an elegant and intuitive input method to rotate and
manipulate a three-dimensional scene with the mouse. With Trackball.js it is
easy to integrate intuitive 3D rotations in your website using CSS3 transforms.

16 Dec · Robert Eisele


HTML5 KINEMATIC CLOCK



16 Dec · Robert Eisele


PLAY HTML5 TETRIS WITH AI

HTML5 Tetris is a fully customizable Tetris game with optional AI feature.

09 Mar · Robert Eisele


PRECISE 220V AC FREQUENCY MEASUREMENT WITH ARDUINO



14 Mar · Robert Eisele


PHP IDNA EXTENSION



14 Mar · Robert Eisele


PHP FACEDETECT EXTENSION



14 Mar · Robert Eisele


PHP SYSLOAD EXTENSION



14 Mar · Robert Eisele


PHP DEFCON EXTENSION



14 Mar · Robert Eisele


PHP INFUSION EXTENSION



14 Mar · Robert Eisele


BUBBLE EVOLUTION



14 Mar · Robert Eisele


BUBBLE DRAG



14 Mar · Robert Eisele


WINAMP EQUALIZER



14 Mar · Robert Eisele


STARSHIP SHOOTER



14 Mar · Robert Eisele


3D WIRE CREATOR



14 Mar · Robert Eisele


FOLLOW THE SWARM



14 Mar · Robert Eisele


PLAY CLASSIC SNAKE GAME ONLINE



14 Mar · Robert Eisele


HTML5 BOOMSHINE



14 Mar · Robert Eisele


HTML PARTICLELINE



20 Jul · Robert Eisele


PUNYCODE WITH PHP

A libidn wrapper for PHP which allows you to generate Punycode from Unicode
through a simple API.

21 Jul · Robert Eisele


LOGICAL OPERATIONS WITH NULL

NULL values have different meanings in PHP and MySQL. Here's a little
explanation after a short analysis.

21 Jul · Robert Eisele


GET THE LAST PERCENTS OUT OF LIGHTTPD

A simple lighttpd path which improves the internal constant string handling. The
patch is already implemented in the stable release.

22 Jul · Robert Eisele


FACE DETECTION WITH PHP

PHP Facedetect Extension. The OpenCV wrapper for PHP allows you to detect faces
on images and to retrieve their X/Y coordinates.

24 Jul · Robert Eisele


ADD HTTP RESPONSE HEADERS IN LIGHTTPD

A simple FastCGI programm to add response headers to lighttpd when PHP and LUA
isn't an option.

25 Jul · Robert Eisele


SIMPLE SYSTEM MONITORING WITH PHP

A simple PHP extension to tell reverse proxys and loadbalancers that the backend
is overloaded. The extension sits between the PHP core and the script.

26 Sep · Robert Eisele


GLOBAL CONSTANTS WITH PHP

A flexible constant management library for PHP which helps to implement a
centralized and easy configuration of your application servers.

30 Sep · Robert Eisele


FAST CIRCULAR BUFFER IN MYSQL

A simple ring buffer implementation in MySQL with an optimization attempt to max
out the performance of the fix sized buffer.

23 Oct · Robert Eisele


WRITE A PID FILE IN BASH

How to write a PID file and spawning a daemon in one single command?

25 Oct · Robert Eisele


HOW I'VE GOT NO NEW .DE DOMAIN

My fabulous attempt of getting no new 2-3 digit .de Domain. But I ended up with
a nice research on weighting good names.

27 Dec · Robert Eisele


STORE SMALL NUMBERS IN BIG NUMBERS

A small mathematical digression about storing small numbers in a larger bit
range to save memory, disk space and index sizes.

27 Dec · Robert Eisele


PHP ENHANCEMENT

A PHP library which adds a bunch of new functions to the core, which could be
found in the one or the other project as global addition.

27 Dec · Robert Eisele


PEOPLE NEAR YOU WITH MYSQL

Find locations around location with an optimized R-Tree index using MySQL
MyISAM.

27 Dec · Robert Eisele


AGE CALCULATION WITH MYSQL

How to calculate a human age based on two date values using MySQL? Here is a
simple function which does this for you.

27 Dec · Robert Eisele


FIELD SIZE AS POWER OF TWO

Is there a difference in using powers of two as field size in MySQL or is this
just a nerdy habit?

27 Dec · Robert Eisele


DEBIAN LIGHTTPD STARTUP SCRIPT

A small Debian bash script to startup lighttpd webserver. There is also an
official one but when compiling the package for yourself you have to use your
own.

27 Dec · Robert Eisele


FULLTEXT GEO SEARCH WITH MYSQL

Fulltext GEO search with MySQL. Additionaly, the population improves the weight
for a fair ranking.

27 Dec · Robert Eisele


SORTED ARRAY TO MYSQL

Retrieving a sorted list from a database is easy. But how do you store a list of
numbers in the same order like in an array to MySQL?

27 Dec · Robert Eisele


MYSQL WISHLIST

My open feature request to the MySQL database server.

17 Feb · Robert Eisele


MY VERY FIRST CHROME EXPERIMENT

A little HTML5 game which shows the capabilities of the new HTML5 canvas object.

24 Mar · Robert Eisele


GENERATE CLIENT-SIDE PNG FILES USING JAVASCRIPT

A pure JavaScript implementation of PNG to draw images directly in the browser
without a canvas.

08 Apr · Robert Eisele


WRITE DATA ASYNCHRONOUSLY TO MYSQL

What is the most effective way of writing data asynchronous to the database? APC
queue, file based queue, Gearman, zeromq, all of them have it's right to exist.

28 Apr · Robert Eisele


DYNAMIC THUMBNAIL GENERATION ON THE STATIC SERVER

Images are needed in several sizes on a website. Generating every file consumes
a lot of disk space. Caching only the sizes they are really requested might be
better.

29 Apr · Robert Eisele


OPTIMIZING INTEGER MULTIPLICATION

A mathematical approach of optimizing integer multiplications for slow MUL
instructions and known constants.

04 Jun · Robert Eisele


ANALYZE ONLINE BEHAVIOR WITH MYSQL AND PHP

An algorithm to determine when users of a website or a community are mostly
online in average.

07 Jun · Robert Eisele


DISABLE ON UPDATE CURRENT_TIMESTAMP IN MYSQL

How to avoid triggering ON UPDATE CURRENT_TIMESTAMP in MySQL?

28 Jun · Robert Eisele


OPTIMIZED WAY OF GETTING SUBQUERIES AT ONCE USING JSON

Retrieving nested data with a single query using JSON as the transport layer.

29 Jun · Robert Eisele


COMBINE CSS AND JAVASCRIPT WITH LIGHTTPD

An approach of combining static data on the fly using lighttpd's mod_magnet to
reduce the number of requests.

07 Jul · Robert Eisele


MY JQUERY PLAYGROUND

Two new jQuery plugins just arrived. A color calculation plugin and a plugin to
manage your border radius

19 Jul · Robert Eisele


USE MYSQL BINLOG TO COLLECT ACCESSLOGS

A lighttpd plugin to use MySQL's replication mechanism to collect accesslogs
from several webservers.

21 Jul · Robert Eisele


SQL-MODES RIGHT TO EXIST

An analysis of whether MySQL's SQL mode has still a right to exist. Result: It
depends!

02 Sep · Robert Eisele


RESOLVE MANY-TO-MANY RELATIONS A BIT DIFFERENT WITH MYSQL

An attempt to store a CSV list of ID's instead of a fully normalized table
design to improve index size and to save grouping.

17 Sep · Robert Eisele


CAMARA SUPPORT IN HTML5 AND JAVASCRIPT

Native webcam support for HTML5 by using a bridge to Flash in order to solve the
technological gap

08 Nov · Robert Eisele


TRANSPARENT QUERY LAYER FOR MYSQL

A query abstraction layer which uses a prepared statement similar approach to
inject cluster management transparently.

17 Nov · Robert Eisele


MYSQL - MY NEW PLAYGROUND

A MySQL UDF to simplify some queries handling with binary, string and group data
in a special way.

10 Jan · Robert Eisele


IS IT POSSIBLE TO AVOID QUERY PARSING INSIDE OF MYSQL?

A question to the MySQL community...

12 Jan · Robert Eisele


CREATE A SIMPLE AND SMALL GIF WITH PHP

A small PHP function to create the smallest GIF possible by the standard in any
color you'd like.

14 Aug · Robert Eisele


TAG CLOUD PLUGIN FOR SMARTY

An extensive Smarty plugin to create tag clouds based on some simple metrics.

20 Jan · Robert Eisele


FIND FRIENDS OF FRIENDS USING MYSQL

A list of MySQL views to get the friends of friends (FOF) from a certain user of
a social network.

08 Jun · Robert Eisele


PHP HACKING

An extensive PHP fork with changes to the core in order to improve performance,
usability and flexibility.

10 Jun · Robert Eisele


FASTER PHP BEHIND FASTCGI

A simple approach improving the performance in real world environments by
reducing the number of copies of the entire DOM.

04 Sep · Robert Eisele


JQUERY PAGINATION REVISED

The best pagination plugin on the market. It combines the features of all
available plugins through a distinct and easy callback interface.

24 Oct · Robert Eisele


OPTIMIZED PAGINATION USING MYSQL

How to implement an optimized pagination with MySQL?

27 Oct · Robert Eisele


FLAG BASED COUNT USING MYSQL

Counting flags in an optimized manner. Normally, the cardinality of flags in
databases is very poor so that a different approach must be used.

12 Jul · Robert Eisele


MYSQL INFUSION UDF FOR STATISTICAL ANALYSIS

An update of the MySQL infusion UDF in order to add new statistical functions to
the MySQL core.

14 Jul · Robert Eisele


STATISTICAL FUNCTIONS IN MYSQL

A list of standard formulas for a statistical analysis with MySQL. Additionally
some new functions are introduced via the infusion UDF

16 Jul · Robert Eisele


OPTIMAL INDEX SIZE FOR VARIABLE TEXT IN MYSQL

Release of a small database auxiliary query to choose the correct index size of
a column.

19 Aug · Robert Eisele


RUNNING STANDARD DEVIATION IN MYSQL

Calculating the standard deviation without using MySQL's aggragate function STD,
but by implementing it by yourself.

05 Mar · Robert Eisele


JAVASCRIPT BIT ARRAY

An optimized JavaScript Bit Vector Implementation

12 Mar · Robert Eisele


RATIONAL NUMBERS IN JAVASCRIPT

A rational numbers library in JavaScript for more precise calculations

10 Jun · Robert Eisele


NEO6MV2 GPS MODULE WITH ARDUINO

Set up a serial GPS module with Arduino

10 Jun · Robert Eisele


NEO6MV2 GPS MODULE WITH RASPBERRY PI



13 Jun · Robert Eisele


FORCING GARBAGE COLLECTION IN NODE.JS AND JAVASCRIPT

How to force the garbage collector in node.js and V8

20 Jun · Robert Eisele


IMPORTING ENTIRE WIKIPEDIA INTO MYSQL

How to import the entire Wikipedia corpus into MySQL with database installation,
creation and actual import

02 Jul · Robert Eisele


COMPLEX NUMBERS IN JAVASCRIPT

A well optimized complex numbers library in JavaScript

06 Jul · Robert Eisele


USING GPS WITH NODE.JS AND JAVASCRIPT

An introduction to the GPS.js library

08 Jul · Robert Eisele


SIMULTANEOUSLY SET AND DELETE BIT FLAGS IN A DATABASE

A proof to get to a simple expression for bit flag deletion and setting

08 Jul · Robert Eisele


STORE A TAG-CLOUD IN MYSQL

A simple approach to guide you throw the steps needed for a tag-cloud stored in
a MySQL database

29 Jul · Robert Eisele


HOW TO WRITE A PHP DAEMON

A full course into how to write a unix style daemon in PHP

30 Nov · Robert Eisele


CREATING AN ADVENT CALENDAR WITH HTML5 AND CSS3

How to create an Advent Calendar with HTML5 and CSS3 with a nice 3D effect

19 Dec · Robert Eisele


USING A WII NUNCHUK WITH ARDUINO

How to hack a Wii Nunchuk to make it work with Arduino

20 Jul · Robert Eisele


ENABLE KEY REPEAT IN MAC OS-X AND DISABLE CHARACTER ACCENT MENU

If you want to change the new behavior of showing an accent-menu instead of
repeating keys in OS X, this trick may help you.

27 Jun · Robert Eisele


A PURE JAVASCRIPT DHCP IMPLEMENTATION

How to implement a DHCP server and a DHCP client in JavaScript to get access to
raw packages

03 Jul · Robert Eisele


SET UP INTERNET SHARING ON MAC OSX USING COMMAND LINE TOOLS

A working solution to set up internet sharing without the system preferences but
command line tools

11 Jul · Robert Eisele


USING GAMEPADS IN JAVASCRIPT VIA NODE.JS

A node.js library to work with Sony PlayStation controllers, Microsoft XBOX
controllers SNES or a bunch of other controllers

14 Jul · Robert Eisele


OPERATE A SYMA S107G REMOTE CONTROL HELICOPTER WITH AN ARDUINO

A deep dive into the remote control toy helicopter Syma S107G to get controlled
with an Arduino board

15 Mar · Robert Eisele


SET EXCEL COLUMNWIDTH PROPERTY IN POINTS WITH VBA

How to set the Excel columnWidth property with VBA in points (centimeter and
millimeter)

13 Mar · Robert Eisele


DIY OHMMETER TO MEASURE RESISTOR VALUES WITH ARDUINO

How to build an ohmmeter cheap and quickly with an Arduino using a voltage
divider

08 Jun · Robert Eisele


HOW TO USE A NOKIA 5110 GRAPHICAL DISPLAY WITH ARDUINO

How to use a Nokia 5110 or Nokia 3310 Graphical Display using the Philips
PCD8544 Controller with Arduino

10 Jul · Robert Eisele


LIGHTTPD MOD_MYSQL_ACCESSLOG



30 Mar ·


CATCH IT! HTML5 GAME



01 Apr · Robert Eisele


JQUERY COLOR PLUGIN XCOLOR



 * 001 Raw Tools 12 Articles
 * 002 Raw Math 12 Articles
 * 003 Raw Things 12 Articles

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