Archive for the ‘C#’ Category
Posted by jpluimers on 2017/02/15
Posted in .NET , C# , Delphi , Delphi 10 Seattle , Delphi 10.1 Berlin (BigBen) , Delphi 2010 , Delphi XE , Delphi XE2 , Delphi XE3 , Delphi XE4 , Delphi XE5 , Delphi XE6 , Delphi XE7 , Delphi XE8 , Development , Encoding , FreePascal , Pascal , Software Development | Leave a Comment »
Posted by jpluimers on 2017/01/17
I will probably need this again somewhere in the future: An exponential back-off implementation I used somewhere; probably room for improvement, but it works good enough.
It’s Delphi, but I’ve not seen practical implementations in C# either.
(the updated version thanks to Anders Melander).
–jeroen
Learn more about bidirectional Unicode characters
function TryGetLocationLockWithExponentialBackOff: Boolean;
const
cBase = 2;
cMaxWaitMilliSeconds = 1500;
var
lWaitMilliSeconds: integer;
begin
Result := True;
lWaitMilliSeconds := cBase;
while (not TryGetLocationLock) do
begin
if (lWaitMilliSeconds > cMaxWaitMilliSeconds) then
Exit(False);
Sleep(lWaitMilliSeconds);
Inc(lWaitMilliSeconds, lWaitMilliSeconds);
end;
end;
Learn more about bidirectional Unicode characters
function TryGetLocationLockWithExponentialBackOff: Boolean;
const
cBase = 2;
cMaxWaitMilliSeconds = 1500;
var
lIteration: Integer;
lWaitMilliSeconds: Single;
begin
lIteration := 1;
lWaitMilliSeconds := 0;
while lWaitMilliSeconds < cMaxWaitMilliSeconds do
begin
Result := TryGetLocationLock;
if Result then
Exit;
lWaitMilliSeconds := IntPower(cBase, lIteration);
Inc(lIteration);
Sleep(Round(lWaitMilliSeconds));
end;
Result := TryGetLocationLock;
end;
Posted in .NET , C# , Delphi , Development , Software Development | 5 Comments »
Posted by jpluimers on 2016/12/15
Without dsquery installable, I had to query an ActiveDirectory spanning two domains.
Here are some links that helped:
–jeroen
Posted in .NET , .NET 2.0 , .NET 3.0 , .NET 3.5 , .NET 4.0 , .NET 4.5 , C# , C# 2.0 , C# 3.0 , C# 4.0 , C# 5.0 , C# 6 (Roslyn) , Development , Software Development | Leave a Comment »
Posted by jpluimers on 2016/11/03
The #Fellows | Unity IoC container: tips, tricks and dirty hacks post is a very readable and to-the-point introduction to Unity IoC focussing on Dependency Injection . Implementation details of various IoC/DI frameworks differ, so some keywords:
Container
InjectionConstructor
InjectionProperty
Inversion of Control
Named registration (or keyed registration)
PerResolveLifetimeManager
Register
RegisterType
Resolve
ResolvedParameter
–jeroen
Posted in .NET , .NET 2.0 , .NET 3.0 , .NET 3.5 , .NET 4.0 , .NET 4.5 , C# , C# 3.0 , C# 4.0 , C# 5.0 , C# 6 (Roslyn) , Development , Software Development | Leave a Comment »
Posted by jpluimers on 2016/10/06
DotPeek offline installers are available:
They are loacated on this page, as ‘Other distribution options’: http://www.jetbrains.com/decompiler/download/
–jeroen
via Offline Installer :: JetBrains Developer Community .
Posted in .NET , C# , Development , Reflection , Software Development | Leave a Comment »
Posted by jpluimers on 2016/10/04
Source: The Deadlock Empire
Via: Face the dragon. Learn the ropes of concurrent programming. – Lars Fosdal – Google+
Source code is available and focuses on C#; maybe one day I’ll make a Delphi version: deadlockempire/deadlockempire.github.io: The Deadlock Empire: Slay dragons, learn concurrency!
BTW: a great book (with nice illustrations at both github and kernel.org) is Source: Is Parallel Programming Hard, And, If So, What Can You Do About It? [WayBack ]
–jeroen
Posted in .NET , C# , Delphi , Development , Multi-Threading / Concurrency , Software Development | Leave a Comment »
Posted by jpluimers on 2016/09/21
It’s been in the System.Array class forever, but remarkably few people do know that it can throw you a NotSupportedException (for instance when calling Add , Insert , Remove , etc).
It does because it implements IList , but not all methods implemented from IList are valid.
And it also indicates that, as the IList Properties allows for IsFixedSize to return false.
A similar case is there for IsReadOnly : then you cannot even modify the values.
Ever since I started teaching .NET/C# classes almost 15 years ago, I warned:
beware when you use IList as not everybody implements all methods.
–jeroen
via:
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 , C# 6 (Roslyn) , Development , Software Development | Leave a Comment »
Posted by jpluimers on 2016/09/06
I’ve published the Delphi version info table as a Gist: https://gist.github.com/jpluimers/b5891600b73642788b492393710c6070 .
Note I need help with these:
The updated script that forms the base of this table is here: https://bitbucket.org/jeroenp/wiert.me/src/tip/Native/Delphi/Scripts/List-Delphi-Installed-Packages.ps1
You can pass any of these args to get information
Individual columns:
CompanyNames, Versions, ProductNames, ProductVersions, BetaNames. ReleaseDates, Architectures, CharacterSets, Defines, CompilerVersions, RTLVersions, DllSuffixes, ProjectVersions, Frameworks, ProductVersions, ProductFullNames, BaseKeyPaths, HKCU-BaseKeyPaths, HKLM-BaseKeyPaths
Base of the below table:
Installed info (installation status obtained through the registry):
InstalledProductVersions, InstalledProductFullNames, InstalledProductSummaries, InstalledPackages
An elaborate wrapper around the Define column is jedi.inc which is used in many projects (both open source and closed source) to distinguish between various Delphi versions, libraries and platforms at compile time (URL: github.com/project-jedi/jedi/blob/master/jedi.inc)
Read the rest of this entry »
Posted in .NET , C# , C# Builder , Delphi , Delphi 10 Seattle , Delphi 10.1 Berlin (BigBen) , Delphi 2005 , Delphi 2006 , Delphi 2007 , Delphi 2009 , Delphi 2010 , Delphi XE , Delphi XE2 , Delphi XE3 , Delphi XE4 , Delphi XE5 , Delphi XE6 , Delphi XE7 , Delphi XE8 , Development , Software Development | 5 Comments »
Posted by jpluimers on 2016/08/18
Empty arrays are not used often as arrays usually are about the presence data, not about the absence .
Here are two ways based on the int data type in C# (the original [WayBack ] examples [WayBack ] are using string, but since string itself is also a kind of array…):
Specify a size of zero:
int[] a = new int[0];
Specify an empty initialisation:
int[] a = new int[] { };
Though many people think arrays are a thing of the past, I think it is one of the first generic types and have their place. For one, enumerating over arrays using foreach is a lot faster in many environments than enumerating over other data types. Another thing is that the fixed nature of arrays can be very beneficial in setting constraints.
That’s why I like the balanced view from Eric Lippert [WayBack ] in Arrays considered somewhat harmful – Fabulous Adventures In Coding – Site Home – MSDN Blogs [WayBack ]
–jeroen
via:
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 , C# 6 (Roslyn) , Development , Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 