Hourly Apps

Best windows scripting language

2011-06-29T18:34:00.001-03:00

I was writing a Batch script and I was looking for a way of listing all files of a directory whose filename matched a regex. I gave up of doing that in a BAT file and I did it in a Python script. Then I found out that I also had to replace some content in those files, and the sed tool was perfect for that. I downloaded some Windows binaries for that tool, but none of those supported the features

stopwatch.Elapsed.Ticks is different from stopwatch.ElapsedTicks

2011-04-26T14:00:00.001-03:00

The .NET class `System.Diagnostics.Stopwatch` has a little secret. stopwatch.Elapsed.Ticksis the number of 100 nanoseconds elapsed since the start of the stopwatch stopwatch.ElapsedTicksis the number of timer ticks, and I don't know what it means

Hudson vs Jenkins, which one should I use?

2011-03-25T09:26:00.002-03:00

Hudson and Jenkins are continuous integration servers. They are both forks of the same codebase created by Kohsuke Kawaguchi, former employee of Oracle, the company which owns the Hudson name. Since Kohsuke abandoned Hudson to work on Jenkins, we wondered which fork would be more actively maintaned and improved. We can draw some metrics analysing their repositories. From GitHub perspective

How to configure your Android device to show up on "adb devices"

2011-03-13T22:22:00.001-03:00

Installing the Google USB Driver package isn't enough to make your android device to show up in the "adb devices" list. You have to follow these instructions too: http://developer.android.com/sdk/win-usb.html#Win7

Expanded version of Static Maps Creator

2011-03-08T19:29:00.003-03:00

Wouldn't be easier to edit static maps on Google Maps' My Maps screen? Yes it is! And since Pamela Fox published her "My Maps -> Static Maps converter" it became possible. But it lacked many feature that I implemented in my version: Polygon simplification When the generated URL exceeds 2048 characters, the polyline resolution is reduced to fit this limit. You can see that the following msid

What I should install to develop Python Google App Engine apps?

2011-02-07T22:24:00.006-02:00

You'll certainly need: Google App Engine Python SDK Python 2.5.4 Eclipse IDE for JavaScript developers PyDev http://pydev.org/updates You'll probably need:Python Imaging Library (PIL) 1.1.7 for Python 2.5 Mercurial Eclipse (HGE) http://cbes.javaforge.com/update You can install either 32 or 64 bit versions of Python. But PIL installer will have trouble to find Python 64 bit. It needs a Windows

What is the Windows Communication Foundation (WCF)?

2011-01-31T09:38:00.011-02:00

WCF is a communication library implemented as of version 3.0. NET Framework allows to isolate the "service implementation" of "communication protocol". Besides facilitating the serialization and deserialization of data, this library also offers interchangeable implementations of the main communication protocols. for example: TCP HTTP - REST SOAP Named Pipes Message Queues WCF requires data to

How to make Log4Net to work with a Windows Service assembly?

2011-01-11T16:52:00.001-02:00

There are 2 main concerns with using Log4Net with Windows Service: 1. XmlConfigurator must have its Watch property set to true 2. The output log file must be written to a folder where the service user has writing rights To solve this you can add this line to your AssemblyInfo.cs: [assembly: log4net.Config.XmlConfigurator(Watch = true)] And you have to choose a suitable output path such as: <

Why use "using" instead of calling the "Dispose" method directly?

2011-01-10T13:41:00.000-02:00

The following statement: using(disposable) { } Has 2 main advantages over the alternative: disposable.Dispose(); It handles null variables gracefully It can be easily extended so you can use using(disposable1) using(disposable2) { } instead of try { disposable1.Dispose(); } finally { disposable2.Dispose(); }

Static Maps Creator

2010-12-19T22:17:00.006-02:00

Pamela Fox has published a static maps creator that encodes polylines from "My Maps": http://imagine-it.org/google/staticmap/encodemymap.php And I improved it: http://static-maps-generator.appspot.com/ There is this interactive maps creator (API v1) http://www.solvium.de/static-map/ But the one below also supports polylines (API v2) http://gmaps-samples.googlecode.com/svn/trunk/

How to install Google App Engine Python SDK?

2010-11-01T11:25:00.002-02:00

You'll need: The latest SDK The latest Python 2.5 (2.5.4 when I posted this) The latest Python Imaging Library for Python 2.5 (1.1.7 when I posted this)

How to publish a private method at runtime?

2010-10-31T12:09:00.002-02:00

Here's how: class AClass { void Private() { } public Action Publish() { return Private; } } class Program { static void Main(string[] args) { var anInstance = new AClass(); var publishedInstance = anInstance.Publish(); publishedInstance(); } }

How to play raw PCM audio data in .NET using C#?

2010-06-19T15:32:00.004-03:00

There is a Windows API for that. You can use the .NET Wrapper in RageLib. RageLib can be found in http://code.google.com/p/gtaivtools/source/browse/#svn/trunk/RageLib class Program{ static byte[] _queue = new byte[0]; static void Filler(IntPtr data, int size) { var length = Math.Min(size, _queue.Length); Marshal.Copy(_queue, 0, data, length); _queue = _queue.Skip(

How to play raw PCM audio data in Matlab?

2010-06-19T15:29:00.000-03:00

function record() Fs = 8000; nBits = 16; nChannels = 1; recorder = audiorecorder(Fs, nBits, nChannels); disp('Start speaking for 2 seconds'); recordblocking(recorder, 2); disp('End of Recording.'); audiodata = getaudiodata(recorder, 'uint8'); player = audioplayer(audiodata, Fs); playblocking(player);

How to prevent Serial-to-USB devices from messing with your mouse on Windows

2010-06-06T23:03:00.000-03:00

Since I am using one of my USB ports to receive RS232 data, it began to scramble my mouse pointer. It move randomly across the screen. It happens because Windows recognizes it as a serial mouse. The solution for this is simple. Your USB device will be listed twice in the Windows Device Manager. All you have to do is disable the mouse entry.

Examples of Memcached telnet commands

2010-06-04T16:29:00.007-03:00

I was looking for a example of a memcached telnet session, here is what I created. It shows the behavior of the set, get, add, gets, cas and replace commands. I introduced the '>' sign before each input line to differentiate it from the output. >add mykey 0 60 11 >hello world STORED >get mykey hello world END >add mykey 0 60 11 >hello world NOT_STORED >replace mykey 0 60 7 >hello w STORED >

How to send Memcached stats to a monitoring tool using bash?

2010-06-01T15:04:00.009-03:00

Zabbix is my network monitoring tool of choice. You can send Memcached stats to it using the simple code bash script below: #!/bin/bashZABBIX_SENDER="/usr/local/sbin/zabbix_sender"ZABBIX_TRAPPER="localhost"ZABBIX_TRAPPER_PORT=10051ZABBIX_ITEM_KEY_PREFIX="memcached_"ZABBIX_HOST="Memcached"MEMCACHED_SERVER="localhost"MEMCACHED_SERVER_PORT=11211STATS=`(sleep 1 ; echo "stats"; sleep 1; echo "quit")

Never uninstall the Team Foundation Server component that comes with Visual Studio 2010

2010-06-01T09:37:00.000-03:00

This component is essential to open solutions that were originally binded to a TFS server (ie. Codeplex projects)

OneWay OperationContract in WCF implications

2010-05-18T13:33:00.000-03:00

OneWay OperationContract in WCF implications causes WebHttpBinding to answer HTTP 202, instead of HTTP 200

How to discover the RGB code for a color on the screen

2010-05-14T23:54:00.002-03:00

If you use Google Chrome you should check out this Eye Dropper extension.

Common acronyms in internet forums, or WTF is IIRC?

2010-05-10T18:59:00.002-03:00

The more polite initialisms: OP = original poster AFAIK = as far as I know IIRC = if I remember correctly IMHO = in my humble opnion RSVP = Répondez s'il vous plaît (answer if it pleases you) The others: LMGTFY = let me google that for you RTFM = read the fucking manual WTF = what the fuck LOL = laughing out loud ROTFLOL = rolling on the floor laughing out loud In instant messaging and chat

What is the best Javascript LINQ implementation?

2010-05-05T09:44:00.001-03:00

When you search for "javascript linq" you'll see: linq.js jslinq jsinq jlinq and many others.... I all have to say is that jslinq don't have GroupBy, Except and many other methods. While linq.js does.

5 ways of optimizing WCF performance

2010-04-05T15:42:00.000-03:00

Try to use the following options transferMode : streamed oneWay unordered asynchronous netTcpBinding or netMsmqBinding

One reason why we can't trust online password storage

2010-02-20T16:58:00.002-02:00

LastPass.com, Passpack.com and many other sites claim that they can store your sensitive data, like credit card numbers and passwords, in an encrypted form, so they don't have access to it. While the services they offer really save you from a lot of work (password memorization and typing) there is a fundamental flaw. The problem is that most of the code that decrypts your sensitive data can be

Did you know that you are helping to save the planet?

2010-01-17T22:17:00.002-02:00

We developers are changing the world, as shown in this IBM presentation: http://www-03.ibm.com/innovation/us/thesmartercity/index.shtml

Introducing Google Chrome Frame, the solution for Internet Explorer

2010-01-17T22:10:00.003-02:00

2 ways to win at the Roulette

2009-09-26T02:21:00.005-03:00

How to win at the Roulette?A simple roulette bet yields 47% maximum winning chance. But if you have more rounds to play, you can achieve better odds. It all depends on your strategy. I designed an algorithm that yields 65% chance of winning some money after few rounds. To tell the whole history I wrote a whole open source C# .NET project that enables developers to write and test its own

How to customize route icons when using Google Maps API

2009-09-15T21:18:00.001-03:00

I just commited an example of how to do that, check the javascript source code at:http://code.google.com/p/google-maps-api-examples/source/browse/trunk/CustomIconsRoute.html

Complete .NET IEquatable implementation reference

2009-08-22T18:05:00.001-03:00

I finally wrote a sample code that shows the correct way to implement all IEquatable related methods:http://code.google.com/p/iequatable-implementation-reference/source/browse/IEquatableReference/trunk/IEquatableReference/ValuesClass.csThe unit tests that justify each line of code are there:http://code.google.com/p/iequatable-implementation-reference/source/browse/IEquatableReference/trunk/

Adding recombination to Image Vectorization Genetic Programming

2009-07-02T09:12:00.005-03:00

After reading the Roger Alsing's arcticle about his Evo Lisa, a genetic approach to image vectorization, I decided to build my own version of it from scratch using C# .NET and TDD. The result is published at Google Code project hosting licensed under LGPL. The key diferences are: 1. It uses only Triangles instead of polygons or splines. 2. It accepts a population parameter. 3. When the population

How to convert MP3 files to WAV files in .NET (C#)

2009-06-30T00:39:00.002-03:00

I have successfully converted compressed audio to PCM files with the Alvas.Audio .NET library. Its FAQ shows how to convert a WAV to a MP3 but not the contrary. So I had to write my own code: static void Main(string[] args) { string mp3File = @"Theme - Simpsons.mp3"; string wavFile = @"Theme - Simpsons.wav"; using (var wr = new Mp3Reader(

Google AppEngine will reduce free quotas to 14%

2009-06-11T12:00:00.008-03:00

Google published on its AppEngine blog the plan to reduce the free use quotas to 6.5 CPU-hours and 1.07 gigabytes of outbound transfer, by June 22nd. It's 14% of the current free CPU time quota and 10% of the current bandwith, and 8,000 of the currently free deployed applications will be charged.Current free quotas:46.30 CPU hours10.00 GBytes Outgoing Bandwith10.00 GBytes Incoming Bandwith1.00

How to draw on a Windows Form using C# .NET

2009-06-06T15:28:00.002-03:00

1. Create a new Windows Forms Application on Visual Studio2. In the design mode click on the form3. On the properties window click on events4. Double click the "Paint" eventand the final step:5. Put the code below in the file that opens:using System;using System.Drawing;using System.Windows.Forms;namespace WindowsFormsApplication1{ public partial class Form1 : Form { private Bitmap

How to convert a Brush to Color in C#

2009-06-03T00:26:00.003-03:00

Or How to get the Color of a Brush object in .NETThe solution is pretty simple: new Pen(brush).ColorThe reverse is also possible new SolidBrush(color)

Object Oriented Javascript, C# Comparison

2009-06-01T17:45:00.004-03:00

C# Code:public class ClassName : BaseClassName{ public object PropertyName { get; set; } public BaseClassName(object argumentName) { this.PropertyName = argumentName; } public void MethodName() { }}Javascript Code:function ClassName(argumentName) { this.PropertyName = argumentName;}ClassName.prototype.MethodName = function() {}

Test your audio spectral sensivity

2009-03-01T18:25:00.009-03:00

I have created a sound file, which plays all musical notes hearable by the humans. It is the pure tone audiometry file, with that file you can test your hearing capabilities because it has all notes played with the same amplitude, but you will hear them at different levels and some of them will not be heard at all.Download and play the file (900 KB):audiometry.mp3In the following spreadsheet

New open-source project: EulerMath

2009-02-08T17:08:00.002-02:00

Project Euler has many mathematical challenges, which can be solved through computer programs. The .NET's Math class doesn't provides all mathematical functions needed for the solution of those problems.Because of this I created EulerMath. The main goal of this project is to create a fast and robust library that provides all common mathematical functions that are necessary to those problems's

The best developers forum

2009-02-02T00:01:00.002-02:00

Stackoverflow.com is a well known developers forum. There you can ask question about any language and the answer comes in less than a minute for the mainstream languages, and in less than an hour for languages like Matlab.The main feature that makes that site better than any forum is a clean (KISS) and useful interface, not resembling any other forum.Please visit my profile there, where you can

Quote of the day: How will the world's doom come?

2009-01-24T11:50:00.002-02:00

The most likely way for the world to be destroyed, most experts agree, is by accident. That's where we come in; we're computer professionals. We cause accidents. - Nathaniel Borenstein

No sound in some AVI videos problem correction

2008-12-21T19:07:00.002-02:00

Sometimes I get some AVI videos that my K-Lite Codec Pack couldn't synthesise its sound. I realized that uninstalling the Codec Pack the sound would work (but the video not). After a series of trials I found the solution: With the codec pack installed, during playback, a couple of icons will appear on the system tray. Double-clicking the FFa icon will give you the ffdshow audio setup window, and

Daily Chess Puzzle

2008-11-04T23:12:00.003-02:00

I'm addicted to chess right now. So I made a Google Gadget of www.chessgames.com daily chess puzzle.The path to add the gadget to your iGoogle homepage is http://www.google.com/ig/adde?synd=open&source=ggyp&moduleurl=jaderd.googlepages.com/dailychesspuzzle.xml

Android is now Open Source

2008-10-21T13:39:00.003-02:00

Finally, i've been decompiling android the past weeks, and now that Android is Open Source, i finally can debug it on my pc.http://source.android.com/download

WinGrep - a simple Windows grep-like console application

2008-10-11T13:13:00.002-03:00

Windows search tool wasn't enough to find the methods I was looking for, inside .jad files. So I wrote a few lines of C# code to have this explendid tool. It behaves like Linux grep, except for its regular expressions, lol.http://jaderd.googlepages.com/WinGrep.exeArguments:1: start folder path (e.g.: c:\)2: file pattern (e.g.: *.class)3: search string (e.g.: getFromLocation)Full example :

Batcher - a simple .NET C# Console Application for multiple java .class files decompiling

2008-10-11T12:44:00.005-03:00

To decompile the whole Android.jar zipped content we need to JAD each .class file. To do it automatically you can use a tool I developed with this specific purpose.http://jaderd.googlepages.com/Batcher.exeArguments:1: jad.exe file path (e.g.: c:\jad.exe)2: unzipped .jar file path (e.g.: c:\android\android)Full example: Batcher.exe c:\jad.exe c:\android\androidNote: JAD files inside the target

Google Android Reverse Geocoder Hack

2008-09-11T00:46:00.003-03:00

I'm trying to publicize the Google Android Reverse Geocoder.The problem is that the response comes in an unknown binary file format.Only the Android.jar can decrypt it, and I can't decompile the JAR (cause it's not java bytecodes) to see how he does it.Anyone has any brilliant idea on this matter?The code follows:Geocoder g = new Geocoder(this);List la = g.getFromLocation(51 , 0, 1); //somewhere

Resizable and movable Controls, C# .NET Forms

2008-07-27T16:03:00.000-03:00

Imagine resizable and movable controls at runtime. Now make it possible! Just download the following .NET open source class.http://jaderd.googlepages.com/ResizableControlDLL.zip

Open source Wave Graph C# .NET Control

2008-07-20T22:49:00.003-03:00

In addition to my Wave Reader C# .NET Class, I am also present my open source Wave Graph Resizable Control, and an example project, all zipped in a single package at the following location:http://jaderd.googlepages.com/WaveGraph.zip

Open source Wave Reader C# .NET Class

2008-07-20T17:50:00.007-03:00

Hello groupies. I'm glad to present to you a didactic code: the Wave Reader C# .NET ClassThe code is hosted at the following location:http://code.google.com/p/dot-net-wave-reader/You can download the zipped source code at:http://dot-net-wave-reader.googlecode.com/files/WaveReader.zip

Goosh Google Gadget

2008-06-03T07:55:00.003-03:00

With the release of Goosh (stands for "google shell"):http://goosh.orgI'm happy to announce my Goosh Gadget:http://hosting.gmodules.com/ig/gadgets/file/110595523932409593167/goosh3.xmland the smaller version:http://hosting.gmodules.com/ig/gadgets/file/110595523932409593167/goosh2.xmlYou can add it to your iGoogle using the following link:http://www.google.com.br/ig/directory?root=/ig&dpos=top&url

Selecting by id in Google's Datastore API

2008-05-31T00:14:00.004-03:00

While developing a Google App, I have found some difficulty while trying to retrieve data by id. The method is very simple, and below is the Phyton code:objectname = ModelName.get_by_id(longIntegerId)This is how to select by id from Google's Datastore APIThanks to: http://www.thinkvitamin.com/features/webapps/developing-with-google-app-engine-part-i

Google Maps Polyline Encoder and Drawing Tool

2008-05-28T18:46:00.005-03:00

or: "How to draw encoded polylines?"or: "2 Steps for polylines encoding for GMaps"Out there are some sites that allows you to draw and/or encode polylines, like these:Encoder javascripthttp://facstaff.unca.edu/mcmcclur/GoogleMaps/EncodePolyline/Polyline and polygons drawing toolhttp://gmaps-samples.googlecode.com/svn/trunk/poly/mymapstoolbar.htmlGoogle's encoderhttp://code.google.com/apis/maps/

Ideas for StreetSize

2008-05-16T09:20:00.002-03:00

Yesterday I sent two e-mails to Matt from http://streetsize.com-------Email 1----------Hello Matt, Thank you for your wonderfull site. I think I'm the first Brazilian user, and I have invited my coworkers to join. I think that you'll achieve great success while you respect your users privacy. I'm also a Google Maps mashups developer.Sugestions: + Let me change my public name. I have my login name

Opening Google Earth (*.kmz) files with the browser

2008-05-14T15:56:00.003-03:00

I already knew that Google Maps shows KML file content at its website. You only need to put the KML's URL at the following site search textbox:http://maps.google.comthen execute the search. But I was unaware that the same applies to Google Earth's KMZ files. They seem unreadable without Google Earth, but you can use the same method above or use the following one:Example KMZ file:http://

Best Google Maps Mashups

2008-05-10T15:47:00.002-03:00

Following are my favorite Google Maps Mashups: 1. Amsterdam Helicopter Game - I'm making my own javascript version, click here to see it. 2. Twitter Spy - See where people are microblogging. It should have geographic boundaries, I could do it myself, but I would have to study Twitter's API. 3. Street View Immersive Videos - Like Google Maps Street View but now as a Video, use the mouse to

Google Maps Javascript Helicopter Game

2008-05-10T15:29:00.009-03:00

Click the following textbox to start to play:Use keyboard arrows < ^ > to navigate and + - for zoomingTo Do list:Integrate with Google Adsense to estabilish goals that the user will have to find, with or without the help of address or pointers.Alternative: Use a categorized list of known places (ex: night clubs) to put the player under a known places knowledge test.Use FireEagle to open the map

Website Performance

2008-05-05T21:53:00.008-03:00

Or "How to make my website faster?"Steve Souders says that he is the YSlow creator, which is a Firefox's and Firebug's extension that calcs the conformity degree of a site with th rules for high performance websites. Now he says he got "14" new rules but lists only 10. Now I will list the current 34 YDN rules plus the 10 "new" ones:Make Fewer HTTP RequestsUse a Content Delivery NetworkAdd an

Yet another post about Firefox plugins

2008-05-05T19:27:00.009-03:00

I can't understand people that like Internet Explorer (IE) better than Mozilla Firefox (FF). Benchmarks like this and the plurality of add-ons are my arguments against those people. Following there are some of the essential FF extensions that I know:IE Tab - some web pages (like .mht) just open in IE, you can open them inside FF with this trick.Customize Google - removes Google Ads from all

Globalization Tips for Web Programmers (ASP.NET)

2008-05-03T10:41:00.008-03:00

The most important thing when you develop an ASP.NET website which interface language is portuguese, is to use the following Web.Config entry:The newbiest programmers usualy forget the that his application users could insert special characters into a form. When sending

iGoogle, Google Gadgets & Orkut Mobile

2008-04-26T01:03:00.004-03:00

My homepage is iGoogle, the customizable Google homepage. There you can have more than the simple Google start page, you can also add gadgets, they are web pages in small containers that resembles windows. My favorite gadgets are:Todo List (source code)GMail - read and write e-mails without leaving the homepage (source code)Google Talk - simple and fast, replaces MSN Messenger (source code)Google

Google Maps for dummies

2008-04-24T23:55:00.005-03:00

Many people thinks first in Google Maps when choosing an API for displaying maps on a website. There are many alternatives, some of them are even better, as Maplink, the best geocodification in Brazilian territory, Yahoo! Maps with its lightweight API, and MS Live Maps, with 3D buildings, they have their advantages and drawbacks, but none of them widespread as Google's API. Below there are the

Cacheable ASP.NET pages

2008-04-22T11:48:00.011-03:00

Or "Caching ASPX pages"Or "How to make ASP.NET pages be stored in the browser's cache?"I used to save every static page in my Web Projects as .HTML files. But Sandro, from MS-Developers taught me how to make cacheable ASPX pages:Just insert the following C# .NET code into the Page_Load Response.Cache.SetExpires(DateTime.Now.AddYears(3));Response.Cache.SetCacheability(

Simple Windows Drumkit

2008-04-16T22:01:00.001-03:00

Would you like to play drums while do you hear your songs? Even if it's only to play while you wait or download something? This app could be nearly invisible so you could play without disturbing you normal pc use, and to avoid your bosses' eyes.With a couple of work hour I made this Simple Drum Kit, that fullfills all those requirements, and beyond, because it uses WAV files that can be replaced