Posts Tagged ‘ Text ’

A useful list of Mind-Mapping tools for college students

It has been brought to my attention an  article containing a list of 50 Mind-Mapping tools for college students.

The list is categorized (free/open, collaboration, project management, multitasking, misc) to assist the reader in the decision. I know five of the programs reported and I have always used Freemind, therefore I find the post very interesting. Students should at least try to use Mind-Mapping tools as an alternative to summarize texts. Give it a try!

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2009
07/28
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BD-incollo 0.9 is out!

It took me about one year to find some time to enhance my project BD-incollo. I worked hard for 5 days and to add new features and fight the (huge) amount of spam that was wasting my database space. Now I’m very proud to announce bd-incollo 0.9, a free, light, speedy, anonymous Pastebin clone written in Python Django. This version introduces a lot of new features, including the possibility to make diffs between pastes, and fights spam using Akismet. Read more about the features on the project page and on the new News section on the website that makes use of BD-incollo, incollo.com .

BD-incollo 0.9 is free software as always, under the Gnu Affero General Public License 3.

Currently, you can:

  • Copy, Paste and store a text / source code snippet to the system
  • NEW! Give other people the possibility to discover your Paste (make a Paste either public or private)
  • Decide to colorize the syntax of the Paste
  • Share it using its URL
  • NEW! Enhance Pastes! Create a Paste starting from an old one
  • NEW! View differences! Makes use of the powerful diff-match-patch by Neil Fraser to see differences between two Pastes
  • NEW! Antispam protection using Akismet and akismet.py by Michael Foord
  • Download it as plain text
  • View it as plain text
  • Search something interesting through other pastes!
  • Report abuses to site admins

It also uses a very smart hash system that automatically re-computes a hash key in case of collision.

Here is an example of Paste: http://incollo.com/f341e6a4b
Here is an example of enhancement of the Paste: http://incollo.com/ba22929ac
Here is a full-screen diff of the Pastes: http://incollo.com/compare/f341e6a4b/ba22929ac

Play with them! Use incollo.com, spread it!

Road to 1.0

1.0 development will start after my next examination session (on September) and will surely include:

  • Some asynchronous improvements
  • The possibility to teach Akismet about Spam and Ham in Pastes (when admin user is logged in)
  • More cleaner code
  • The possibility to associate a user to its Pastes via a Cookie (always anonymous) and let him delete them
  • Comments to snippets?
  • What else? Contact me if you’ve got ideas!

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2009
07/26
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Introduction To Software Testing

Elements and Concepts – A brief overview

Download PDF version of the whole document. You can browse the article online but I encourage the download of the PDF since it is written with accuracy.

Introduction

This document contains some basic concepts and definitions about software testing. It has been written for studying a part of the Software Engineering Project course at my University. It is composed by a summary of the intersection of more than 10 different sources, all of which are cited. If you feel that some contents of this publication belong to your intellectual property and it is not cited, please contact the author who is willing to correct any mistake.

The first part of the paper focuses on the definition of the most important key aspects of software testing. Then some information about input partitioning are given. What follows is a research about code coverage and two useful and famous tools, Control-flow coverage and Data-flow analysis. A complete example on using those tools is then given. The second half of the document also contains the definition of the most important software testing practices.

The goal of this tiny document is to clarify key terms and therefore become a base start for the reader to go in deep with the interested topics. Another goal is to give a simple but clear example about data flow analysis, as I realized that not all the people understand the examples around the Net.

Software Testing

Software Testing is an empirical investigation conducted to provide stakeholders with information about the quality of the product or service under test, with respect to the context in which it is intended to operate. Software Testing also provides an objective, independent view of the software to allow the business to appreciate and understand the risks at implementation of the software. Test techniques include, but are not limited to, the process of executing a program or application with the intent of finding software bugs. It can also be stated as the process of validating and verifying that a software program/application/product meets the business and technical requirements that guided its design and development, so that it works as expected and can be implemented with the same characteristics. 1

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2009
07/19
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Introduction to HTTP mind-map

As I promised about 4 hours ago, here is my introduction to Hyper Text Transfer Protocol in form of a mind map.
It is to be intended as a really short introduction to this protocol. Like the previous one about computer networks, the mindmap summarizes materials copyrighted by Tanenbaum and also material taken from Wikipedia.

The topics covered are:

  • Scope of the protocol
  • HTTP connection
    • HTTP/1.0
    • HTTP/1.1
  • HTTP request methods:
    • GET
    • HEAD
    • PUT
    • POST
    • DELETE
    • TRACE
    • CONNECT
    • OPTIONS
  • Message Headers
    • Request Headers – all
    • Response Headers – all
  • Status Codes:
    • 1xx Information
    • 2xx Success
    • 3xx Redirection
    • 4xx Client error
    • 5xx Server Error
  • Sessions:
    • Cookies
    • Server-Side sessions
  • Secure HTTP – HTTPS:
    • By URI scheme
    • HTTP Upgrade Header
    • SSL/TLS

You can browse an HTML version online.

You can download:

As always, you are free and encouraged to contact me in case of errors or anything else.
Hope you like it!

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2009
03/01
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How to have both Mac Os X and Linux installed and share the same home directory files

So much time since my last post! I’m sure that the best way to come back to blog posting is a nice tutorial.
I’m going to write how to have the same home directory shared between Mac Os X and Gnu/Linux. Let me call Gnu/Linux just Linux from now on.

A unique place for your working directory on both Mac Os X and Linux!

The configuration I’m proposing should be very confortable, as it works with symbolic links.
It lets you to boot either Mac Os X or Linux and have the same directories and files for your everyday use. Meanwhile, the important configuration files and directories (e.g. ~/Library for Mac Os X, ~/.config for Linux) are kept separately on their corresponding partitions.
Another advantage of this configuration is that you can have a small partition dedicated to Linux – let’s say 10GB but could be even less – just for installing the programs you need, while your videos, documents, music files are kept inside the biggest partition, the one for Mac Os X.

Disclaimer, assumptions

Basically, you will mount your Mac Os X root partition in Linux, and soft-link your important directories to your Linux home directory.
You will then use them as there were real directories in your Linux home directory. For this how to, there are a couple of things I assume that:

  • You have Linux installed and running natively on your Mac(Book). I’m going to give commands with sudo, so configure it if you’re not using Ubuntu-based distros!
  • You know your partition layout. The following is mine. I’m going to use it as example:

    disk0s2 /dev/sda2 MacOsx /
    disk0s3 /dev/sda3 Linux /
    disk0s4 /dev/sda4 Swap

  • You have a clean Linux home directory. This means that you don’t have directories whose names are in conflict with those on your Mac Os X home directory
  • You are going to disable file system journaling on your Mac Os X root partition! Please read carefully this Wikipedia page about journaling and this Apple page about HFS+ journaling if you need more information.

Boot Mac Os X

Follow these instructions under Mac Os X:

Open a Terminal.

Identify your Mac Os X root partition:

$ sudo diskutil list

/dev/disk0
#: TYPE NAME SIZE IDENTIFIER
0: GUID_partition_scheme *111.8 Gi disk0
1: EFI 200.0 Mi disk0s1
2: Apple_HFS MacOsX 99.9 Gi disk0s2
3: EFI 10.7 Gi disk0s3
4: Linux Swap 1.0 Gi disk0s4

Disable file system journaling for the partition:

$ sudo diskutil disablejournal disk0s2

Do a ls -n of your home directory to discover your user id uid:

$ ls -n

total 0
drwx——+ 11 501 20 374 25 Feb 17:43 Desktop
drwxrwxrwx+ 32 501 20 1088 26 Feb 18:19 Documents
drwxrwxrwx+ 8 501 20 272 26 Feb 18:06 Downloads
[Few Others ...]

My UID is 501. Keep your UID in mind, you will need it under Linux. You obtain the same results by using the command “id”.
Reboot your Mac.

Boot Linux

Follow these instructions in a linux shell.

Change your Linux user id (UID). To correctly share the same home directory between both OS, you need to have on Linux the same UID of your Mac Os X user.

sudo usermod -u <uid> <username>

(sudo usermod -u 501 bodom_lx in my case)

To have your new UID applied, either reboot or logout from every shell you opened, even from your desktop environment. Login again.

Create a directory in which you are going to mount Mac Os X root partition:

sudo mkdir /media/</strong>MacOsX</strong
sudo chmod 775 /media/</strong>MacOsX</strong>

put this line at the end of /etc/fstab, as root, with your favourite editor:

/dev/sda2 /media/MacOsX hfsplus rw,nosuid,nodev,uhelper=hal 0 0

Remember to change sda2 and MacOsX

Either reboot the system or type:

sudo mount /media/MacOsX

To mount your Mac Os X root directory in your mount point directory.

Now cd to your Linux home directory and begin to soft-link all of your important Mac Os X directories. Here are some of those I needed:

ln -s /media/MacOsX/Users/bodom_lx/Documents/ .
ln -s /media/MacOsX/Users/bodom_lx/Pictures/ .
ln -s /media/MacOsX/Users/bodom_lx/Projects/ .
[…and many more…]
 

Don’t soft-link the Library directory.

Conclusions

Now you have the same important files shared on both Mac Os X and Linux, while the important hidden configuration files are kept in separate phyisical places.
You can listen to your Itunes mp3 collection on both operating systems. You can now develop programs under Gnu/Linux. You can reboot your machine to Mac Os X and take notes during the lectures, and so on! Hope you liked this how to, and comment it as well. Contact me if you find some mistakes or you’re in trouble!

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2009
02/27
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How to limit a field with javascript-prototype and display the counter

For job purposes I had to learn a lot of JavaScript, including AJAX related stuffs. Like every lazy (but intelligent) developer, I looked around for frameworks that could help me doing my work. I knew that prototype existed, but I never looked at it because of lack of interest. Well it’s great, it’s really great! Nowadays everybody should use frameworks, as their abstraction permits a rapid development without worrying about things like platform compatibility, in our case browsers. Prototype also has a very nice and clean syntax that overtakes functions not compatible with every browser.

In this post I’m going to report a very nice function I implemented for limiting Form input fields, like textarea and input of type text. You have to call it via onkeyup and onkeydown events. The function accepts 3 parameters: field, limit and counterDesired.
The first is the field object, you should use the keyword this for a value.
The second parameter is a limit value, the number of characters that the field should contain at maximum.
The third parameter is optional, false as default. It permits to add a visual counter after the field, like the one you see on YouTube, for example. You can either tell to the function to add the counter for you (put inside a <span> block) or to put it inside another block you’ve already defined. In the second case, the block must have an id of the form ‘fieldID_counter’

This is the compact version, see below for some examples and the expanded, explained version:

<script type="text/javascript">
// < ![CDATA[
function limit_text(field, limit, counterDesired) {
    if (counterDesired == null)
        counterDesired = false;
    var length = $F(field).length;
    if (length > limit)
        $(field).value = $(field).value.substring(0, limit);
    if (counterDesired) {
        if ($($(field).id + '_counter')) {
            $($(field).id + '_counter').update($F(field).length + " / " + limit);
        } else {
            var counterText = new Element('span', {'id': $(field).id + '_counter'});
            counterText.update($F(field).length + " / " + limit);
            $(field).insert({'after': counterText});
        }
    }
}
// ]]>
</script>
 

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2008
12/03
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