Zocor Alternative Viagra

Zocor alternative viagra This week I ran into wanting to use C# 4.0 optional parameters, zocor alternative viagra but wanted StructureMap (my IoC tool of choice) to respect the default value specified for those optional parameters.

The Problem

Zocor alternative viagra In this example, zocor alternative viagra we’ll be pulling a command out of the container.  The important part is the optional constructor parameter (level), zocor alternative viagra and it’s default value (Level.Info).

public class LogCommand


    IDestination _destination;

    Level _level;


    public LogCommand(

        IDestination destination, zocor alternative viagra Level level = Level.Info)


        _destination = destination;

        _level = level;



    /* logging code here */



Zocor alternative viagra Here is your basic usage, zocor alternative viagra but doesn’t work since StructureMap doesn’t know how to take advantage of the optional parameters with default values.

var container = new Container(config =>


    config.Scan(scanner =>








var logCommand = container.GetInstance<LogCommand>();


Zocor alternative viagra The last line results in an exception because StructureMap doesn’t know how to fill in the level parameter.

The Solution

Zocor alternative viagra We can solve this by adding a new convention.  One that adds information about default constructor arguments.  Here is the implementation of the convention:

public class DefaultCtorParameterConvention : IRegistrationConvention


    public void Process(Type type, zocor alternative viagra Registry registry)


        if(type.IsAbstract || type.IsEnum)



        var ctor = type.GetGreediestCtor();





        var inst = registry.For(type).Use(type);


        foreach(var param in ctor.GetOptionalParameters())




Zocor alternative viagra Note: GetGreediestCtor, zocor alternative viagra HasOptionalParameters, zocor alternative viagra and GetOptionalParameters are extension methods.  We’ll see their implementation shortly.

Zocor alternative viagra The convention inherits from the IRegistrationConvention, zocor alternative viagra which is how you implement new conventions in StructureMap.  It has only one method: Process.  We filter out types that are abstract, zocor alternative viagra are enums, zocor alternative viagra or have constructors that don’t have optional parameters.  Once we realize we have a constructor we want to deal with, zocor alternative viagra we use the Child method, zocor alternative viagra that sets either a property or a constructor argument (for our case, zocor alternative viagra it’ll always be a constructor argument), zocor alternative viagra and then we set it’s value to the parameter’s default value, zocor alternative viagra as provided by the ParameterInfo object, zocor alternative viagra for each optional parameter.

Minor Details

Zocor alternative viagra Curious about the implementation of GetGreediestCtor or the *OptionalParameters methods?  If not, zocor alternative viagra skip this section.

public static bool HasOptionalParameters(

    this ConstructorInfo ctor)


    return ctor.GetOptionalParameters().Any();



public static IEnumerable<ParameterInfo> GetOptionalParameters(this ConstructorInfo ctor)


    return ctor.GetParameters().Where(

        param => param.Attributes




public static ConstructorInfo GetGreediestCtor(

    this Type target)


    return target.GetConstructors()

        .WithMax(ctor => ctor.GetParameters().Length);



public static T WithMax<T>(

    this IEnumerable<T> target, zocor alternative viagra Func<T, zocor alternative viagra int> selector)


    int max = -1;

    T currentMax = default(T);


    foreach(var item in target)


        var current = selector(item);

        if(current <= max)



        max = current;

        currentMax = item;



    return currentMax;



Zocor alternative viagra  

The Usage

Zocor alternative viagra Here’s how to use your new convention.

var container = new Container(config =>


   config.Scan(scanner =>









var logCommand = container.GetInstance<LogCommand>();


Zocor alternative viagra Now, zocor alternative viagra when we pull the LogCommand out of the container, zocor alternative viagra the level parameter gets defaulted to Level.Info, zocor alternative viagra just like we specified in the constructor.  Sweet!


Zocor alternative viagra This implementation is somewhat limiting, zocor alternative viagra but the version I have in my github repo is a little more open and configurable.  It allows you to customize the instance key/name you use when registering your type, zocor alternative viagra and also allows you to do additional, zocor alternative viagra non-standard registrations if you need to.

Zocor alternative viagra Also, zocor alternative viagra this doesn’t work if you’ve selected a constructor using the SelectConstructor config API from StructureMap, zocor alternative viagra I’m not sure how to tap into that facility to look for that constructor rather than the greediest.

Zocor alternative viagra Am I missing something?  Did something not make sense?  Leave me a note!

Average Rating: 4.8 out of 5 based on 241 user reviews.


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Viagra generic I live in a .NET world most of the time, viagra generic and I know of no similar solution for .NET.  It’s been awhile since that first time, viagra generic and I’ve tinkered here and there trying to get something comparable, viagra generic but usually come up short.  That is until I found watchr.

Viagra generic Watchr gave me the file change detection capabilities I needed, viagra generic and the extensibility to do whatever I want when a file has been detected as changed.  This made it incredibly easy to hook up some autotest goodness in my .NET world.

Viagra generic You'll have to have ruby installed, viagra generic and gems.  Then, viagra generic the very first thing you'll have to do is

Viagra generic gem install watchr --source=http://gemcutter.org

Viagra generic Here is my watchr script:

require 'autotest.rb'

watch( '^.*UnitTest.*.cs$' ) do |match|

Viagra generic This is basically just a regex that says to watch any *.cs files that also contain the string “UnitTest”, viagra generic and when it finds a change in a file matching that description, viagra generic call run_test with the matched file name.

Viagra generic So all the magic is in autotest.rb… lets check it out:

require 'rexml/document'

def build(test_project)
  `msbuild /nologo #{test_project}`

def mstest(test_container, viagra generic test_results_file, viagra generic tests_to_run)
  tests_to_run = ([""] << tests_to_run).flatten

  File.delete(test_results_file) if File.exists?(test_results_file)
  `mstest /nologo /resultsfile:#{test_results_file} /testcontainer:#{test_container} #{tests_to_run.join(" /test:")}`
  test_results = process_mstest_results(test_results_file)
  File.delete(test_results_file) if File.exists?(test_results_file)

  return test_results

def process_mstest_results(results_file)
  results = {}
  File.open(results_file) do |file|
    xml = REXML::Document.new(file)

    results[:num_tests] = xml.get_elements("//UnitTestResult").length
    failures = []
    xml.elements.each("//UnitTestResult[@outcome='Failed']") do |e|
      failure = {}
      failure[:message] = e.elements["Output/ErrorInfo/Message"].get_text

      stack = e.elements["Output/ErrorInfo/StackTrace"].get_text.value
      stack_match = /^.*at (.*) in(.*):line (\d+)$/.match(stack)

      failure[:stack] = stack_match[1] if stack_match
      failure[:location] = stack_match[2] if stack_match
      failure[:line] = stack_match[3] if stack_match

      failure[:stack] = stack if !stack_match

      failures << failure
    results[:failures] = failures

  return results

def show_results(results)
  puts "#{results[:num_tests]} tests run (#{results[:failures].length} failures)"
  results[:failures].each do |failure|
      puts "---------------------------------------"
      puts "Message: #{failure[:message]}"
      puts "Location: #{failure[:location]}"
      puts "Line: #{failure[:line]}"
      puts "Stack Trace: #{failure[:stack]}"

def run_test(file_name)
  test_container = ""
  test_results_file = "result.trx"
  test_project = ""

  system("echo Detected change in:")
  system("echo   #{file_name}")
  system("echo Building and Testing")

  test_namespace = ''
  test_class = ''
  test_names = []

  File.open(file_name, viagra generic "r") do |f|
    f.each do |line|
      ns_match = /^namespace (.*)$/.match(line)
      test_namespace = ns_match[1] if ns_match

      class_match = /^\s*public class (.\w*).*$/.match(line)
      test_class = class_match[1] if class_match

      test_name_match = /^\s*public void (\w*).*$/.match(line)
      test_names << test_name_match[1] if test_name_match

  test_names = test_names.map { |n| "#{test_namespace}.#{test_class}.#{n}" }

  results = mstest(test_container, viagra generic test_results_file, viagra generic test_names)

Viagra generic The key parts (I think) are the fact that I’m using MSTest to run my tests (this can easily be modified to run your framework of choice… note MSTest is not my choice ;) ).  The result parsing is also specific to the MSTest output format, viagra generic but should be simple enough for any framework that can output XML. Viagra generic Also, viagra generic I'm making some assumptions based on my project... Viagra generic we've got one unit test project, viagra generic so I know I can run tests in a single DLL, viagra generic and rebuilding only that project, viagra generic I don't have to worry about choosing the correct project and output dll to build and run tests in.

Viagra generic To get the thing up and running, viagra generic just run

Viagra generic watchr <path to watchr script>

Viagra generic Please, viagra generic use/adapt/give feedback/whatever at will.

Viagra generic Go forth and autotest, viagra generic .NET comrades!

Average Rating: 4.7 out of 5 based on 255 user reviews.


Free Viagra Sample

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