Articles by Andreas Gieriet (Articles: 8, Tip/Tricks: 23)

Articles: 8, Tip/Tricks: 23

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DevOps
Unit Testing	RelationAssert as extension to the unit test Assert class 30 Jan 2012 Updated: 11 Mar 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 20,030 Bookmarked: 4 Downloaded: 137 Please Sign up or sign in to vote. How to define RelationAssert as an extension to the VisualStudio Assert class.
General Programming
	RAII (Resource Acquisition Is Initialization) C# Helper Classes 28 Oct 2010 Updated: 29 Oct 2010 Rating: 3.64/5 Votes: 14 Popularity: 4.18 Licence: CPOL Views: 42,055 Bookmarked: 10 Downloaded: 0 Please Sign up or sign in to vote. Some useful RAII C# helper classes for functionality that does not implement IDisposable
Algorithms	Demystify C# floating-point equality and relation operations 12 May 2012 Updated: 14 May 2012 Rating: 4.97/5 Votes: 18 Popularity: 6.12 Licence: CPOL Views: 54,414 Bookmarked: 25 Downloaded: 0 Please Sign up or sign in to vote. Make floating point equality and relation operators reliable based on a comparison epsilon value.
	Converting Postfix Expressions to Infix 20 Jun 2012 Updated: 20 Jun 2012 Rating: 5.00/5 Votes: 5 Popularity: 3.49 Licence: CPOL Views: 17,312 Bookmarked: 4 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Converting Postfix Expressions to Infix"
	Polymorphic Extension Visitor with C# 26 Sep 2010 Updated: 26 Sep 2010 Rating: 4.45/5 Votes: 7 Popularity: 3.76 Licence: CPOL Views: 34,143 Bookmarked: 13 Downloaded: 173 Please Sign up or sign in to vote. .NET 4 finally allows to define polymorphic extension visitors
Programming Languages
C#	Escaping in C#: characters, strings, string formats, keywords, identifiers 22 Apr 2012 Updated: 21 Aug 2012 Rating: 4.90/5 Votes: 58 Popularity: 8.64 Licence: CPOL Views: 754,553 Bookmarked: 89 Downloaded: 0 Please Sign up or sign in to vote. Different possibilities to escape literals and names/keywords.
	Invent your own Dynamic LINQ parser 27 Mar 2012 Updated: 14 Oct 2014 Rating: 4.95/5 Votes: 28 Popularity: 7.17 Licence: MIT Views: 74,407 Bookmarked: 56 Downloaded: 243 Please Sign up or sign in to vote. This is an alternative for "Dynamically generate a LINQ query with a custom property".
	Mathematical Expression Parser Using Coco/R 26 Apr 2012 Updated: 26 Apr 2012 Rating: 4.94/5 Votes: 8 Popularity: 4.46 Licence: CPOL Views: 27,963 Bookmarked: 15 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Mathematical Expression Parser Using Recursive Descent Parsing"

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General Programming
Regular Expressions	Decode quoted-printable data by Regex [Tip/Trick] 13 Feb 2012 Updated: 14 Feb 2012 Rating: 4.50/5 Votes: 4 Popularity: 2.71 Licence: CPOL Views: 20,561 Bookmarked: 1 Downloaded: 0 Please Sign up or sign in to vote. A "single-liner" to decode quoted-printable data.
String	A String.StartsWith that uses a StringComparer [Tip/Trick] 24 Feb 2012 Updated: 24 Feb 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 9,720 Bookmarked: 0 Downloaded: 0 Please Sign up or sign in to vote. This alternative is not substantially different, it simply splits the function into two:one for clippingone for comparingpublic static string ExtClipRight(this string a, int n){ return (n < 0 \|\| a.Length <= n) ? a : a.Substring(0, n);}...public static bool...
	String.Insert - insert a separator on given positions [Tip/Trick] 18 Apr 2012 Updated: 18 Apr 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 9,141 Bookmarked: 3 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "String.Insert - insert a separator on given positions"
Programming Languages
C#	Splitting a Collection into Multiple Arrays - The Linq Way [Tip/Trick] 1 Jun 2012 Updated: 1 Jun 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 17,702 Bookmarked: 2 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "How to split an array into multiple arrays"
	To Toggle or Not to Toggle - xor is Your Friend [Tip/Trick] 12 Jan 2013 Updated: 12 Jan 2013 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 18,370 Bookmarked: 4 Downloaded: 0 Please Sign up or sign in to vote. Short tip to show a convenient use of the lesser known xor operator
	C# Iterator Pattern demystified [Tip/Trick] 3 Apr 2012 Updated: 9 Apr 2012 Rating: 4.96/5 Votes: 17 Popularity: 6.11 Licence: CPOL Views: 78,344 Bookmarked: 32 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "How to use the IEnumerable/IEnumerator interfaces"
	Why C# interface inheritance makes sense: see LINQ... [Tip/Trick] 21 May 2012 Updated: 22 May 2012 Rating: 4.00/5 Votes: 3 Popularity: 1.91 Licence: CPOL Views: 33,330 Bookmarked: 7 Downloaded: 0 Please Sign up or sign in to vote. How Linq extension methods benefit from interfaces inheriting from interfaces
	Sorting C# collections that have no collating sequence [Tip/Trick] 27 Jan 2013 Updated: 28 Jan 2013 Rating: 5.00/5 Votes: 3 Popularity: 2.39 Licence: CPOL Views: 23,044 Bookmarked: 8 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Sorting using C# Lists"
	Converting InFix to PostFix by Recursive Descendent Parser in C# [Tip/Trick] 23 Apr 2012 Updated: 23 Apr 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 13,802 Bookmarked: 2 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Converting InFix to PostFix using C#"
	ChainedComparer as Fluent Implementation for IComparer<T> [Tip/Trick] 18 Jun 2015 Updated: 18 Jun 2015 Rating: 4.75/5 Votes: 3 Popularity: 2.27 Licence: CPOL Views: 5,400 Bookmarked: 5 Downloaded: 0 Please Sign up or sign in to vote. A generic fluent implementation for a prioritized IComparer class
	Counting lines in a string [Tip/Trick] 26 Feb 2012 Updated: 28 Feb 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 17,561 Bookmarked: 0 Downloaded: 0 Please Sign up or sign in to vote. Great analysis!I found out that Regex can be accelerated by a factor of about two.Instead of new Regex(@"\n", RegexOptions.Compiled\|RegexOptions.Multiline);you can speed up by using:new Regex(@"^.*?$", RegexOptions.Compiled\|RegexOptions.Multiline);But admittedly, nothing beats...
	Parsing a postfix expression in C#, my naive approach [Tip/Trick] 21 Dec 2010 Updated: 21 Dec 2010 Rating: 5.00/5 Votes: 1 Popularity: 0.00 Licence: CPOL Views: 7,440 Bookmarked: 1 Downloaded: 0 Please Sign up or sign in to vote. For those who like dense code, here is a sample :) - Make the dictionary static readonly, init directly- Swap the arguments in the lambda expressions and call by direct pop from the stack- Make the regex simpler and put the logic of parsing into the Exec (the regex only tokenizes the...
	Partial DateTime Object Equality [Tip/Trick] 13 Mar 2012 Updated: 15 Mar 2012 Rating: 5.00/5 Votes: 1 Popularity: 0.00 Licence: CPOL Views: 11,530 Bookmarked: 4 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Partial DateTime Object Equality"
	Hourglass Mouse Cursor Always Changes Back to its Original Image. How? [Tip/Trick] 27 Dec 2010 Updated: 5 Jan 2011 Rating: 4.40/5 Votes: 4 Popularity: 2.65 Licence: CPOL Views: 17,186 Bookmarked: 1 Downloaded: 0 Please Sign up or sign in to vote. This topic is also covered by the RAII topic as described in RAII (Resource Acquisition Is Initialization) C# Helper Classes[^].Applying the RAII pattern results in more expressive code:using (new RAIIGuard(()=>owner.Cursor, c=>owner.Cursor = c)){ owner.Cursor =...
	(C#) Determining whether the current build mode is Debug or Release [Tip/Trick] 24 Feb 2012 Updated: 24 Feb 2012 Rating: 5.00/5 Votes: 1 Popularity: 0.00 Licence: CPOL Views: 12,030 Bookmarked: 0 Downloaded: 0 Please Sign up or sign in to vote. I prefer the [Conditional("DEBUG")] attribute over #if DEBUG.This is especially advised for your logging example.E.g.[System.Diagnostics.Conditional("DEBUG")]private void Validate() { /* check instance integrity */ }or[System.Diagnostics.Conditional("DEBUG")]public static...
	How to Toggle String Case in .NET [Tip/Trick] 14 Jun 2012 Updated: 14 Jun 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 8,261 Bookmarked: 2 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "How to Toggle String Case in .NET"
	Who knows Enumerable.Range(...)? [Tip/Trick] 18 Apr 2012 Updated: 14 Apr 2013 Rating: 4.97/5 Votes: 13 Popularity: 5.54 Licence: CPOL Views: 60,785 Bookmarked: 18 Downloaded: 0 Please Sign up or sign in to vote. Make loops behave deterministic-by-construction
	Use wildcard characters * and ? to compare strings [Tip/Trick] 20 Feb 2012 Updated: 20 Feb 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 9,060 Bookmarked: 2 Downloaded: 0 Please Sign up or sign in to vote. How about transforming first into a Regex and then letting the Regex do the work? E.g.:public static Regex GetRegex(string wildcard){ string pattern = Regex.Replace(wildcard, @"([^?]+)?([?])?", m => Regex.Escape(m.Groups[1].Value) +...
	Alternatives to encode List<string> into one string [Tip/Trick] 11 Nov 2012 Updated: 11 Nov 2012 Rating: 5.00/5 Votes: 1 Popularity: 0.00 Licence: CPOL Views: 12,120 Bookmarked: 4 Downloaded: 0 Please Sign up or sign in to vote. XML Serialize versus hand crafted CoDec (as alternative to "Advance String Split and Joiner")
	Implement Thread Safe One-shot Bool Flag with Interlocked.Exchange() [Tip/Trick] 30 Apr 2012 Updated: 4 Dec 2013 Rating: 4.83/5 Votes: 4 Popularity: 2.91 Licence: CPOL Views: 87,094 Bookmarked: 8 Downloaded: 0 Please Sign up or sign in to vote. Wrapping Interlocked.Exchange to mimic a thread safe one-shot bool flag
C# 4.0	LINQ: OrderBy with Complex Sort Key [Tip/Trick] 5 Jun 2012 Updated: 5 Jun 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 15,222 Bookmarked: 7 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Sorting Strings based on the position of the block letter"
	Attaching a Console to a WinForms application [Tip/Trick] 24 Feb 2012 Updated: 25 Feb 2012 Rating: 5.00/5 Votes: 1 Popularity: 0.00 Licence: CPOL Views: 6,100 Bookmarked: 1 Downloaded: 0 Please Sign up or sign in to vote. To not having spoiled the client code with #if DEBUG, you might use the following:[STAThread]static void Main(){ Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); try { Debugging.DebugSetupConsole(); ...
C++98	C++11 (and C++98) Syntax/Grammar as Fully Linked HTML page [Tip/Trick] 7 Feb 2012 Updated: 12 Feb 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 25,340 Bookmarked: 7 Downloaded: 0 Please Sign up or sign in to vote. HTML page with all syntax/grammar productions of C++98/C++11
Visual Basic	Call Functions Until One Meets Condition [Tip/Trick] 19 Jun 2012 Updated: 19 Jun 2012 Rating: 0.00/5 Votes: 0 Popularity: 0.00 Licence: CPOL Views: 9,500 Bookmarked: 3 Downloaded: 0 Please Sign up or sign in to vote. This is an alternative for "Call Functions Until One Meets Condition"
Web Development
HTML	Remove all the HTML tags and display a plain text only inside (in case XML is not well formed) [Tip/Trick] 15 Feb 2012 Updated: 15 Feb 2012 Rating: 5.00/5 Votes: 2 Popularity: 1.51 Licence: CPOL Views: 11,113 Bookmarked: 2 Downloaded: 0 Please Sign up or sign in to vote. I think the following Regex and HtmlDecode would do:string html = ...;string textonly = HttpUtility.HtmlDecode( Regex.Replace(html, @"\|", ""));Any HTML construct that would not be stripped off properly by this?

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Andreas Gieriet

Founder eXternSoft GmbH

Switzerland

I feel comfortable on a variety of systems (UNIX, Windows, cross-compiled embedded systems, etc.) in a variety of languages, environments, and tools.
I have a particular affinity to computer language analysis, testing, as well as quality management.

More information about what I do for a living can be found at my LinkedIn Profile and on my company's web page (German only).

Articles by Andreas Gieriet (Articles: 8, Tip/Tricks: 23)

Articles: 8, Tip/Tricks: 23

Average article rating: 4.73

DevOps

General Programming