In the street with my laptop

What's new?


Nouveautés (version française de cette page) Neuigkeiten (deutsche Version dieser Seite)
2021.06.17   Free Pascal   New mathematics Free Pascal GUI application available: Analytical geometry of circles: Determination of the tangent, the intersection with a line or another circle, the outer and inner squares.

2021.06.14   General   New website functionality available: The Lazarus/Free Pascal application screenshots slideshow offers the visitor a simple way to view, what applications are available (for free download) on this site. The slideshow (manual as well as automatic with choosable time interval) displays a screenshot (with a short description) of all my GUI applications. Clicking the screenshot links to the application details page (where you'll also find the download links of the application itself and the Free Pascal sources). Note the custom buttons Next domain and Previous domain that allow you to quickly browse to the screenshots of the applications you are interested in (biology, chemistry, computing...).

2021.06.13   Free Pascal   New version of my Lazarus/Free Pascal program Text file sort available, with a new command line parameter, mandatory for file override and giving now the possibility to specify the same filename for input and output.

2021.06.09   Free Pascal   New geography Free Pascal GUI application available: Castles of Germany, Austria and Switzerland picture-quiz, including a slideshow, allowing to display the 344 castle photos. New version of my Castles of France and the Benelux picture-quiz, several of the photos, that may be copyright-protected, having been replaced; please, upgrade!

2021.06.06   General   After the search functionality, now the In the street with my laptop guestbook ready (available in the Help menu). If you like my site, have found interesting articles, useful applications or helpful program source code, or if for any other reason, you want to support me and my site, please sign it (just 2 minutes of your time to write some short message). Thanks.

2021.06.03   Free Pascal   The 8th application in my electronic circuits, based on logic gates series: Binary incrementers and decrementers.

2021.06.01   Web/DB   New tutorial in the Web and Database Programming Tips section: Uploading files using CGI and Perl.

2021.05.29   General   Another search feature is being installed: The Lazarus/Free Pascal Programming section search tool allows to display lists of the applications (and sources) available for download, by domain (biology, chemistry, languages...), by function (exercise generator, quiz, kids software) and by language (may be interesting for people, who search for programs with Luxembourgish GUI, for example). Previewed (not yet available): search of applications (or articles) by keyword (such as acid-base, equation, animals...) or by Free Pascal feature (for example: string grid, timer, memo).

2021.05.24   General   In the street with my laptop has now its own site search engine (available in the Help menu). With the free version of Google Programmable Search Engine, visitors can search www.streetinfo.lu, the same way they do for the whole web.

2021.05.23   Free Pascal   Similar to my Learn the Russian alphabet program, new (ancient) languages related Lazarus/Free Pascal GUI application available: Learn the Sanskrit letters.

2021.05.19   General   Up from today, all data transfer to and from my site will be encrypted (usage of the HTTPS protocol by default). In fact, all access via the insecure HTTP protocol is redirected to HTTPS. This ensures, that everybody, that visits the site, will have a secure connection. Thus, new URL: https://www.streetinfo.lu. One drawback, however: The HelioHost servers use TLS 1.2 and, having a shared IP address, my webserver uses autoSSL, depending on Server Name Indication (SNI). This means that older operating systems and older webbrowsers (e.g. Internet Explorer 6, standard browser on Windows XP; not sure if Windows XP is able to connect with Firefox) will no longer be able to access the site. I preview to create an error page for those users, whose operating system/webbrowser does not support the required protocols.

2021.05.15   Computing   New tutorial in the Computer basics: System & Security section: Managing Search History in Windows 10 File Explorer. The tutorial explains, how to clear search history and, by modifying the Windows Registry, how to completely disable it.

2021.05.13   Free Pascal   New version of my Windows folder lister application. Text file export problem with column alignment for lines containing non-ANSI characters fixed.

2021.05.11   Free Pascal   New geography Lazarus/Free Pascal GUI application available: Castles of France and the Benelux picture-quiz, slideshow included.

2021.05.09   General   Some global modifications applied to my site. Removed my custom visitor count scripts, entirely relying on the HelioHost awstats application. Created a new section Learning: Mathematics and Science for non-computing related tutorials and help texts. Created a new sub-section Multimedia (audio, video, pictures) in the Computer Basics section. Changed the News page: year-month-day date format; links to the new application/article, instead to the corresponding section. Moved the Lazarus/Free Pascal executables download files to .../files/win64/. Moved the AnimalDB folders (AnimalDB still offline) directly beneath the htdocs (no more redirect). Started to add a new navigation bar, with drop-down menus, giving direct access to downloads and other stuff, that I judge important. Previewed (not yet implemented) new functionalities like website help, site and section search, guestbook. As these maintenance operations are still in progress, some links may actually not work. Sorry for this...

2021.05.06   Free Pascal   New mathematics Lazarus/Free Pascal GUI application available: Creating simple fractals using a basic L-System (40 sample L-system files included). Amazing pictures, created with a simple string-replacement "language".

2021.04.28   Computing   New help text available in the Computer basics: Home & Office section: Help feature not accessible in Microsoft Office!?

2021.04.26   Free Pascal   Very similar to my USA quiz, new Lazarus/Free Pascal GUI application available for download: German Bundesländer quiz, with questions concerning the capital, the surface area, the number of inhabitants or the land flag.

2021.04.20   Free Pascal   New chemistry Lazarus/Free Pascal GUI application available: Strong acid-base titrations (including a real-time simulation of such titrations).

2021.04.18   Computing   New tutorial in the Computer basics: Multimedia section: Merging video files in Windows 10.

2021.04.17   Free Pascal   Sorry for not having noticed it before. In my Lazarus/Free Pascal GUI applications, using a .html help file, help is not available, if you use a Chromium based webbrowser. Applications concerned (and correctly working version available now): Flower quiz and Kids puzzle.

2021.04.15   Free Pascal   Data update for my Kids puzzle Lazarus/Free Pascal GUI application: 4 new puzzle pictures (16, 24, 45 and 60 pieces), the total number of puzzle pictures being now 31.

2021.04.14   Free Pascal   Data update for my Memory game Lazarus/Free Pascal GUI application: 3 new picture sets (making a total of 17 now): Rainbows, roses, volcanoes.

2021.04.12   Free Pascal   A short help text, entitled Lazarus IDE: Some weird error messages in the Lazarus/Free Pascal programming tips section. May be useful for people, who begin to develop FPC applications with Lazarus.

2021.04.10   Free Pascal   In a certain sense, an extended combination of Sumdoku and Factors, with area results obtained by one of the four basic arithmetic operations (instead of the sums resp. the products), the new Lazarus/Free Pascal GUI application Number puzzle: Kendoku.

2021.04.09   Web/DB   New biology web application available online: DNA molecular weight calculator.

2021.04.04   Free Pascal   New Lazarus/Free Pascal command line program available: Copy of the Windows lock screen pictures to a user directory. Sometimes, these photos are really amazing!

2021.04.02   Free Pascal   New version of my Lazarus/Free Pascal command line program Monthly count of the downloads from a website available, with now the possibility to specify a program output directory in the configuration file.

2021.03.31   Computing   New tutorial in the Computer basics: Home & Office section: Adding custom words to LibreOffice dictionaries.

2021.03.30   Free Pascal   New version of my Lazarus/Free Pascal GUI application The geometrical transformations, with now, beside the translations and the rotations, also the reflexions and the homotheties available.

2021.03.27   Web/DB   All my web applications (except AnimalDB) are now online again!

2021.03.25   Computing   New text in the Computer basics: System & Security section: Dell G3 laptops and Windows 10 problems: Problems, that I encountered myself and, as show the numerous posts in the forums, that are experienced by many users.

2021.03.17   Web/DB   XSS vulnerability seems not to be the big issue to resolve, as I thought. Just some testing of the user input... My mathematics web applications (linear equations in 1, 2 and 3 variables; logarithm equations) are online again!

2021.03.13   Free Pascal   Similar to my quiz about the world's longest rivers, here a new geography Lazarus/Free Pascal GUI application: World mountains quiz.

2021.03.11   Homeless   New article in the Experiences and reflections section of my Homeless life in Luxembourg site: Must homeless people distrust those, who say wanting to help us?

2021.03.10   Free Pascal   Essentially the same as Sumdoku, but with area products, instead of sums: New Lazarus/Free Pascal GUI application available: Number puzzle: Factors.

2021.03.06   Free Pascal   New physics Lazarus/Free Pascal GUI application (exercise generator and learning program) available: Color addition and subtraction.

2021.02.28   Free Pascal   New tutorial in the Lazarus/Free Pascal project section of my site: Installing supplementary Lazarus/Free Pascal packages.

2021.02.23   Free Pascal   New Lazarus/Free Pascal command line program available: Peter de Jong attractors. No idea, what this could be? Just have a look at the program documentation: The beauty of mathematics!

2021.02.20   Free Pascal   New physiology Lazarus/Free Pascal GUI application available: Tetanized muscle contraction, a simple program to draw the graph of shortening velocity and output power as a function of the muscle load, based on either Hill's equation or simple cross-bridge kinetics models.

2021.02.17   Free Pascal   Data update for my Kids puzzle Lazarus/Free Pascal GUI application: 3 new puzzle images available (15, 20 and 32 pieces).

2021.02.11   Free Pascal   Continuing with my logic games Lazarus/Free Pascal GUI applications, a new logic game: Number puzzle: Sumdoku.

2021.02.09   Free Pascal   New version of my Coins calculation game available in the Lazarus/Free Pascal GUI applications section, now in English and with the choice between EU (euro-based) and US (dollar-based) coins.

2021.02.04   Computing   New text in the Computer basics: Network and Internet section: Web browser trouble. Some personal considerations based on these last weeks experiences with Firefox, Opera, Google Chrome, Microsoft Edge, Comodo Dragon and Comodo IceDragon.

2021.01.29   Free Pascal   New Lazarus/Free Pascal GUI application ready: Creating MS Windows file associations.

2021.01.22   Free Pascal   Data update for my Kids puzzle Lazarus/Free Pascal GUI application: 4 new puzzle images available (15, 30, 40 and 60 pieces).

2021.01.20   Free Pascal   The 7th of my Lazarus/Free Pascal GUI applications, dealing with logic-gates based electronic circuits: Simulation of binary multipliers.

2021.01.17   Free Pascal   New language related Lazarus/Free Pascal GUI application ready: Learn the Hebrew alphabet. New version, with some improvements, of the Learn the Greek alphabet application.

2021.01.16   Computing   New short help text in the Computer basics: System and security section: Installing .NET framework 3.5 on Windows 10.

2021.01.15   Free Pascal   New mathematics trainer (exercise generator) for primary school pupils available in the Lazarus/Free Pascal GUI applications section: Column calculations - Multiplication.

2021.01.12   Free Pascal   New computing related Lazarus/Free Pascal GUI application available for download: Windows folder lister shows the objects (files and subfolders) of a folder with name, extension, type (system or other), size, date and file attributes. The listing may be exported to a file: text, CSV or HTML.

2021.01.08   Homeless   New article in the Experiences and reflections section of my Homeless life in Luxembourg site: Impressions of an afternoon spent in Luxembourg-City.

2021.01.04   Free Pascal   New version of my Lazarus/Free Pascal GUI application Memory game, the picture sets being no longer included within the application download archive, but may be individually downloaded from my site (link for this added to the application's menu). 4 new picture sets available: mountains, lakes, fall, castles.

2021.01.03   Free Pascal   New version of my Lazarus/Free Pascal command line program Monthly count of the downloads from a website available, the year to be considered now entered by the user (instead of automatically using the current year).


2020.11.06   Web/DB   The problem with my CGI scripts seems not only concern the access to MySQL, and is possibly not limited to Perl. To avoid potential problems, I have decided to temporarily remove most of my web applications from the server, in particular the HTML color picker and the 4 math exercise generators.

2020.11.04   Web/DB   For technical reasons (security problems within the code of database related Perl scripts), AnimalDB has been taken offline (probably for a longer period).

2018.08.26   General   Finally it has become a reality: streetinfo.lu: my own .lu domain! Big thanks to the one, who has made this possible!

2018.06.07   General   Due to the kindness of a gentle and friendly man, I had the chance to get an account on the HelioHost "Tommy" server. I made the decision to restart my "In the street with my laptop" website with a new URL: www.streetinfo.heliohost.org.

May 2018   General   Crash of the "Johnny" server and the need to entirely rebuild it. My website down for over a month. In a mood fluctuating between resignation and new hope, I continued to develop Lazarus/Free Pascal programs and writing homeless related articles.

Dec 2017   General   Creation of an account on the HelioHost test server "Johnny" and started the "In the street with my laptop" website with URL www.allu62.heliohost.org, containing informatics related stuff (in particular my Lazarus/Free Pascal applications) as well as information concerning the homeless people in Luxembourg.