110 Percent, a little more

Software Engineer, Web and Mobile Developer. Technologies: ASP.NET, ASP, C#, VB, HTML, XHTML, XML, CSS, JavaScript, Android, Protovis...

[fmedrano]

Using .jar file from C#, approximate string comparison

A few days ago I was needing a library or API to implement a approximate string comparision between two character strings. Well, I'm a C# programmer and this library doesn't exist. Fortunately, Java has a implementation called secondstring wich has a lot of known functions such Jaro, Jaccard, Levestein, TFIDF and others.

I know a little of Java but my overall project is in code C#, therefore was neccesary call this library from C#, here is when the project IKVM became a hero.

The IKVM's web site has a really poor documentation, anyway I've could find the solution. So, I just converted my .jar file in a .dll file, to allow calls to functions and algorithms inside it.

The sentence in cuestion is below:

c:\ikvm\bin\ikvmc -target:library secondstring-20060615.jar

This returns a .dll file (secondstring-20060615.dll) ready to be referenced from our .NET project!!!

Download Secondstring API

Download IKVM

Hope this helps.

[fmedrano]

SQL Server 2008 can't save changes to tables

When you design a table in a database and then try to make a change to a table structure that requires the table to be recreated, the management tools will not allow you to save the changes.

You will get an error stating, “You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require the table be re-created.”

What a pesky problem.  It prevents you from making progress when you making database changes. It’s a good thing you can turn it off.

This is caused when you make one of the following changes:

You change the Allow Nulls setting for a column.

You reorder columns in the table.

You change the column data type.

You add a new column.

Here’s how you fix it.

In Management Studio, go to Tools –> Options –> Designers –> Tables and Designers and uncheck the Prevent Saving Changes that require table re-creation option.

Source: http://chrisbarba.wordpress.com/2009/04/15/sql-server-2008-cant-save-changes-to-tables/

[fmedrano]

A funny tool to generate a random paper

Searching papers about bibliometrics and other stuff, I've found in the Web, a tool that enable generate a scholar paper just including authors's names.

The link in question is: SCIgen - An Automatic CS Paper Generator

I've tried with a set of names and I got great results. However, the papers have a correct format.

Try it and tell me.

[fmedrano]

How execute .R script file?

An R script is simply a text file containing (almost) the same commands that you would enter on the command line of R. To run a script only is necessary give the path, in our case, my workspace is in the folder D:\R\ , our example is in D:\R\example.r, therefore the path referred is:

D:\\R\\example.r

And the next step, run your script with command “source”, just how show below here:

>  source (“D:\\R\\example.r”)

  Other solution is set the workspace. First, we must sure where is it. Then we use the command getwd(), to know where is the location and the command setwd(Path), to set the new location:

> getwd()

[1] "C:/Users/federico/Documents"

> setwd("D:\\R\\")

> getwd()

[1] "D:/R"

> source("example.r")

  For more detail visit http://cran.r-project.org/doc/contrib/Lemon-kickstart/kr_scrpt.html

[fmedrano]

Data visualization of Global Life Expectancy using Protovis and GMap

This development aims to give a general look has evolved over the life expectancy in the last 20 years, according to the World Health Organization. To do this, I used free tools and present that allowed me to carry out this work.

You can download it  here