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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for December 19th, 2013

Delphi XE5 Update 2 got released last week, end-of-year Delphi XE5 offer, #CodingInDelphi book

Posted by jpluimers on 2013/12/19

Just around the start of the Delphi XE5 end-of-year special offer (more details below), Delphi XE5 Update 2 was released (for geeks: version 19.0.13856.4978). It adds C++ Builder for iOS support, and fixes many bugs.

What I like most is that the majority of XE5 Update 2 bugfixes are not FireMonkey related.

It indicates the Delphi team puts a lot of effort in the classic Delphi stuff, where still a lot of Delphi users earn their money.

Since Delphi XE5 Update 2 is a re-install, the best is to download the ISO image which – like the updates for PAServer for Mac (ftpd) and PAServer for Windows (ftpd) – is on both the altd and ftpd server.

XE5 promotion offers

Best of all: you get RAD Studio XE5, Delphi XE5, or C++Builder XE5  (: Read the rest of this entry »

Posted in Delphi, Delphi XE5, Development, Software Development | Tagged: , | 7 Comments »

Delphi XE3/XE4: removing empty .VLB files; XE5 update 2 and special offers are out. #codingindelphi

Posted by jpluimers on 2013/12/19

Even when not using Visual Live Binding, Delphi generates empty .VLB files in both Delphi XE3 (virtually always) and Delphi XE4 (most of the time).

Visual Live Binding is one way of binding data to UI in FireMonkey and can also be used in VCL, but does not have to (Alister Christie made a nice video ▶ Delphi Training Tutorial #77 – Visual Live Bindings – YouTube about it).

Empty VLB files, and a batch file to delete them

The “empty” VLB files are almost empty, as they are exactly 3 bytes long and contain the byte sequence EF BB BF which is the Unicode BOM (byte order mark) for the UTF-8 encoding. Read the rest of this entry »

Posted in Delphi, Delphi XE3, Delphi XE4, Delphi XE5, Development, QC, Software Development | Tagged: , | Leave a Comment »

Borland Fun Facts: Matt Pietrek worked there too!

Posted by jpluimers on 2013/12/19

Another episode in the Missed Schedule series that was originally scheduled for 20131201:

Until I read the comments at Monitoring the Monitor, I only knew the early days of Matt Pietrek‘s work at NuMega and as co-author of one of the first Undocumented Windows books (another one appeared about the same time).

Now I know Matt was one of the people interviewing Allen Bauer for his first position at Borland.

A bit more search revealed Matt worked at Borland from 1988 until 1992, roughly the era from Turbo Pascal 5 until Borland Pascal 7 (when Borland already had started researching Delphi), but more importantly with Turbo Debugger versions 1-3 that were indispensable when programming using Turbo C / Turbo C++ and Borland C++.

When Borland was working in Delphi 95, and Microsoft on Windows 95, he moved to Nu-Mega (later Acquired by Compuware) doing lots of work in debuggers.

Some interesting links from or involving Matt:

–jeroen

Posted in Borland Pascal, Debugging, Delphi, Delphi 1, Development, Pascal, Software Development, Turbo Pascal | 2 Comments »

XOR swap/exchange: nowadays an almost extinct means to exchange two distinct variables of the same size

Posted by jpluimers on 2013/12/19

Almost a year ago, a thread on “premature Delphi optimization” came by on G+ about this code:

procedure ExchangeInteger(var AValue1, AValue2: Integer);
begin
  AValue1 := AValue1 xor AValue2;
  AValue2 := AValue1 xor AValue2;
  AValue1 := AValue1 xor AValue2;
end;

I don’t think that was premature optimization, just some code from an old fart that had already been programming in the era where processors had reasons to use it:

Back then, the only efficient way to exchange two variables of the same data type was using the XOR swap algorithm.

Nowadays you have more options, and this is where the fun in that thread began, which I will show in a minute.

First a bit of history

The XOR swap algorithm was widely known in the 80s of last century and before, especially because the 6502 processor (oh the days of LISA Assembler) was vastly popular, as was the Z80. Together, they powered the majority of the home computers in the 70s and 80s.

Read the rest of this entry »

Posted in Borland Pascal, Delphi, Delphi 1, Delphi 2005, Delphi 2006, Delphi 2007, Delphi 2009, Delphi 2010, Delphi 3, Delphi 4, Delphi 5, Delphi 6, Delphi 7, Delphi 8, Delphi x64, Delphi XE, Delphi XE2, Delphi XE3, Development, History, Pascal, Software Development, Turbo Pascal, UCSD Pascal | 7 Comments »

 
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