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Archive for February, 2013

Please write dates and times so that everyone understands them, not just you. xkcd: ISO 8601

Posted by jpluimers on 2013/02/28

ISO 8601 was published on 06 05 88 and most recently amended on 12 01 04

ISO 8601 was published on 06 05 88 and most recently amended on 12 01 04

Boy, am I glad with the xkcd: ISO 8601 post and image on the right.

One reason:

Please write dates and times so that everyone understands them, not just you.

The alt-text of the comic is hilarious (ISO 8601 was published on 06 05 88 and most recently amended on 12 01 04) showing the confusion of using 2 digit years not knowing which field means which (I thin XKCD author Randall Munroe and Mathematics of the ISO calendar got some of the dates, see PDF search dates below).

I found out in the mid 1980s that people I was communicating with internationally (back then the internet was forming and you already had BITNET Relay chat and email) were using different date formats than I did.

Ever since that, I’ve used the YYYY-MM-DD format of writing dates, encouraging others to use as well and as soon as I found out that was a standard, started to evangelize ISO 8601 (there is an ISO 8601 category on my blog), which – at the time of writing this – had had revisions in 1998 (on 1998-06-15), 2000 (on 2000-12-15) and 2004 (on 2004-12-01).

A lot later I found out that back in 1971, this date format was a recommendation, and in 1976 already a standard. Not nearly as old as Esperanto though (:

Speaking about languages:

At the end of last century, after Delphi 5 added year 2000 support (which made the 16-bit Delphi 1 disappear from the box as the effort to prove the product including all libraries was year 2000 proof), Delphi went cross platform.

The Delphi team working on both Kylix 1 and Delphi 6, the also added a DateUtils unit which provides a lot of cuntionality, including support for weak numbers. The first test version always assumed week 1 was the one with januari first in it. As ISO 8601 also indicates how the first week of a year should be determined, a couple of people (Jeroen W. Pluimers, Glenn Crouch, Rune Moberg and  Ray Lischner) provided code that fixed this and a few other things in the unit. We even got mentioned by Cary Jensen!

That code is now also part of the RemObjects ShineOn library. That DateUtils unit is now on GitHub.
A Delphi XE version of the code (and a Delphi 2007 one) are now at NickDemoCode (Thanks Nick Hodges!).

Delphi is not the only environment having ISO 8601 support. XML has, .NET has, etc: it is now wide spread.
So follow your tools, and start using it yourself as well (:

Too bad the ISO 8601 standard text is not available publicly:

I remember the Y2K preparation era where the ISO-8601 standard was freely available at http://www.iso.ch/markete/8601.pdf, soon after the Year 2000, the PDF got locked behind a payment engine.
ISO suffers from heavy link rot too, for instance the ISO 3166 country codes used to be at http://www.iso.org/iso/prods-services/iso3166ma, but are now at http://www.iso.org/iso/home/standards/country_codes.htm. What about HTTP 303 or 302 redirect here guys?

Luckily people keep cached copies:

  1. “ISO 8601” “First edition” “1988-06-15” filetype:pdf
  2. “ISO 8601” “Second edition” “2000-12-15” filetype:pdf
  3. “ISO 8601” “Third edition” “2004-12-01” filetype:pdf

–jeroen

via: xkcd: ISO 8601.

Posted in .NET, Delphi, Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 6, Delphi 7, Delphi 8, Delphi x64, Delphi XE, Delphi XE2, Delphi XE3, Development, ISO 8601, Power User, Prism, Software Development | Tagged: , , , , , , , , , , , , , | 10 Comments »

Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs

Posted by jpluimers on 2013/02/28

Interesting: Command line tool to manage Windows 7 Libraries, with source code – The Old New Thing – Site Home – MSDN Blogs.

Especially as next to some documentation, it points to these two:

–jeroen

Posted in .NET, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, Batch-Files, C#, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Development, Scripting, Software Development | Leave a Comment »

Free Chapters 1-4 Professional Android Programming with Mono for Android and .NET/C# | Wrox P2P

Posted by jpluimers on 2013/02/27

Cool: free starter is a PDF with chapters 1-4.

–jeroen

via: Free Xamarin Studio and Free Chapters 1-4 Professional Android Programming with Mono for Android and .NET/C# | Wrox P2P.

Posted in .NET, Android, C#, Development, Mobile Development, Mono for Android, Software Development | Tagged: , , , , , | Leave a Comment »

A few more interesting links on Delphi, C# and CLR history (trip down memory lane; Peter Sollich)

Posted by jpluimers on 2013/02/27

The continuation of the trip down memory lane

Few people know the name Peter Sollich, as he always chose not to be a public figure (for instance, he is absent on the Outstanding Technical Achievement video).

Peter has been very important for both the Delphi and the .NET worlds: he was the original author of the 32-bit product that became the Delphi x86 compiler.

A few interesting links came up when using his name in some Google searches.

–jeroen

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, .NET CF, C++, C++ Builder, Delphi 1, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Development, Software Development | 2 Comments »

Behind the Code with Anders Hejlsberg (via: Cape Cod Gunny Does Delphi: Priceless)

Posted by jpluimers on 2013/02/26

I remember having heard this interview on audio a long while ago, but couldn’t find it back. Now I stumbled across Cape Cod Gunny writing about this great video where Anders Hejlsberg is interviews by Research Channel for an hour. To quote Cape Cod Gunny:

I just watched this interview with Anders Hejlsberg for the first time. This is truly an amazing interview. It’s rather long, about 1 hour, but it is so worth it. I’m not giving anything away… you’ll have to just watch and enjoy.

I am giving a few things away: trip down memory lane, putting big parts of software development history into perspective,

Since Anders has been so versatile, influential and still humble, this is a must watch for anyone in the software field. To quote Research Channel:

This episode features industry luminary, Anders Hejlsberg. Before coming to Microsoft in 1996 he was well noted for his work as the principal engineer of Turbo Pascal and the chief architect of the Delphi product line. At Microsoft, he was the architect for the Visual J++ development system and the Windows Foundation Classes (WFC). Promoted to Distinguished Engineer in 2000, Anders is the chief designer of the C# programming language and a key participant in the development of Microsoft’s .NET Framework. In this show, Anders is joined by a surprise guest. This episode of ‘Behind the Code’ is hosted by Barbara Fox – former senior security architect of cryptography and digital rights management for Microsoft.

Thanks Gunny for pointing me at this!

–jeroen

via: Cape Cod Gunny Does Delphi: Priceless: Behind the Code with Anders Hejlsberg.

(PS: how a video published in the C# 3 era can be so current <g>).

And if you feel for more, here, hereherehere and here are some more, are a few lists of videos where Anders speaks.
From a historic perspective, I like these most:

Posted in .NET, .NET 1.x, .NET 2.0, .NET 3.0, .NET 3.5, .NET 4.0, .NET 4.5, C#, C# 1.0, C# 2.0, C# 3.0, C# 4.0, C# 5.0, Delphi, Delphi 1, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Development, Software Development | 4 Comments »

 
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