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Comparison between Different Methods to Iterate Over a List of Items

, 7 Mar 2011 CPOL
Comparison between different methods to iterate over a list of items and see which method is the most effective
LoopExecutionComparison.zip
LoopExecutionComparison
Local.testsettings
LoopExecution.Application
LoopExecution.Application.csproj.vs10x
Properties
LoopExecution.Library
LoopExecution.csproj.vs10x
LoopExecution.Library.csproj.vs10x
Properties
LoopExecution.Test
LoopExecution.Test.csproj.vs10x
Properties
LoopExecutionComparison.suo
LoopExecutionComparison.vsmdi
TestResults
ThreadResultsWriteLine.csv
ThreadReultsSleep.csv
TraceAndTestImpact.testsettings
using System;
using System.Collections.Specialized;
using System.Text.RegularExpressions;

namespace LoopExecution.Application
{
    /// <summary>

    /// Arguments class

    /// </summary>

    public class Arguments
    {
        // Variables

        private StringDictionary Parameters;

        // Constructor

        public Arguments(string[] Args)
        {
            Parameters = new StringDictionary();
            Regex Spliter = new Regex(@"^-{1,2}|^/|=|:",
                RegexOptions.IgnoreCase | RegexOptions.Compiled);

            Regex Remover = new Regex(@"^['""]?(.*?)['""]?$",
                RegexOptions.IgnoreCase | RegexOptions.Compiled);

            string Parameter = null;
            string[] Parts;

            // Valid parameters forms:

            // {-,/,--}param{ ,=,:}((",')value(",'))

            // Examples: 

            // -param1 value1 --param2 /param3:"Test-:-work" 

            //   /param4=happy -param5 '--=nice=--'

            foreach (string Txt in Args)
            {
                // Look for new parameters (-,/ or --) and a

                // possible enclosed value (=,:)

                Parts = Spliter.Split(Txt, 3);

                switch (Parts.Length)
                {
                    // Found a value (for the last parameter 

                    // found (space separator))

                    case 1:
                        if (Parameter != null)
                        {
                            if (!Parameters.ContainsKey(Parameter))
                            {
                                Parts[0] =
                                    Remover.Replace(Parts[0], "$1");

                                Parameters.Add(Parameter, Parts[0]);
                            }
                            Parameter = null;
                        }
                        // else Error: no parameter waiting for a value (skipped)

                        break;

                    // Found just a parameter

                    case 2:
                        // The last parameter is still waiting. 

                        // With no value, set it to true.

                        if (Parameter != null)
                        {
                            if (!Parameters.ContainsKey(Parameter))
                                Parameters.Add(Parameter, "true");
                        }
                        Parameter = Parts[1];
                        break;

                    // Parameter with enclosed value

                    case 3:
                        // The last parameter is still waiting. 

                        // With no value, set it to true.

                        if (Parameter != null)
                        {
                            if (!Parameters.ContainsKey(Parameter))
                                Parameters.Add(Parameter, "true");
                        }

                        Parameter = Parts[1];

                        // Remove possible enclosing characters (",')

                        if (!Parameters.ContainsKey(Parameter))
                        {
                            Parts[2] = Remover.Replace(Parts[2], "$1");
                            Parameters.Add(Parameter, Parts[2]);
                        }

                        Parameter = null;
                        break;
                }
            }
            // In case a parameter is still waiting

            if (Parameter != null)
            {
                if (!Parameters.ContainsKey(Parameter))
                    Parameters.Add(Parameter, "true");
            }
        }

        // Retrieve a parameter value if it exists 

        // (overriding C# indexer property)

        public string this[string Param]
        {
            get
            {
                return (Parameters[Param]);
            }
        }
    }
}

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Michael Bookatz
Software Developer
United Kingdom United Kingdom
I'm a software developer with 4 years experience of using C# and Microsoft SQL server.
 
I work on line of business desktop applications that cross the entire development stack with the full development life cycle.

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