tany3

##重複処理 WhereとFirstOrDefault - Replace with single call to FirstOrDefault()

###変更前

  collection.where(item => item.Equals(value)).FirstOrDefault();

###変更後

 collection.FirstOrDefault(item => item.Equals(value));

tany3

##カウントを取らなくてい - Use method Any() あるcollectionが0件であることを知りたいなら、!Any()を使う。 Any()は有無を返す。Count()は個数を返すので、数え上げ処理が動く。 ###変更前

if (collection.Count() == 0) { ... } else { ... }

###変更後

if (!collection.Any()) { ... } else { ... }

tany3

###仕様を明確にする - Field can be readonly 初期化時だけセットするフィールドはreadonlyにすることで、副作用を防ぐことができる（安全弁になる）。

public class Book
{
  private string readonly name;
  private int readonly ISBN;
  
  public Book(string name, int isbn)
 {

tany3

# Test data
## countries

Afghanistan
Albania
Algeria
Andorra
Angola
Antigua and Barbuda
Argentina

tany3

IEnumerableをそのまま使うと、使う度に毎回変換される。遅延実行。 http://confluence.jetbrains.com/display/ReSharper/Possible+multiple+enumeration+of+IEnumerable

Assuming that GetNames() returns an IEnumerable, we are, effectively, doing extra work by enumerating this collection twice in the two foreach statements. If GetNames() results in a database query, you end up doing that query twice, while both times getting the same data.

ということで、特に複数回使う場合など適宜ToList()やToArray()しておく。

参考：LINQ クエリの概要 (C#) http://msdn.microsoft.com/ja-jp/library/bb397906.aspx

tany3

using System;
using CSChatworkAPI;

namespace Example
{
    class Program
    {
        static void Main(string[] args)
        {
            var client = new ChatworkClient(@"APIToken"); // TODO:APIToken

tany3

#
#see http://melcher.it/2013/03/powershell-list-all-iis-webapplications-net-version-state-identity/
#
try{
    Import-Module WebAdministration
    Get-WebApplication
     
    $webapps = Get-WebApplication
    $list = @()
    foreach ($webapp in get-childitem IIS:\AppPools\)

tany3

#
#start web site
#
$targetSiteNames = ( "WebSite1", "WebSite2" )
$targetAppPools = ( "AppPool1", "AppPool2" )

"Settings.Target Sites:"
foreach ($name in $targetSiteNames) { "`t" + $name }
"Settings.Target AppPools:"
foreach ($name in $targetAppPools) { "`t" + $name }

tany3

#
#stop web site
#
$targetSiteNames = ( "WebSite1", "WebSite2" )
$targetAppPools = ( "AppPool1", "AppPool2" )

"Settings.Target Sites:"
foreach ($name in $targetSiteNames) { "`t" + $name }
"Settings.Target AppPools:"
foreach ($name in $targetAppPools) { "`t" + $name }

tany3

c:\Program Files\Oracle\VirtualBox>VBoxManage.exe clonehd "D:\src.vdi" "D:\dst.vdi"
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%
Clone hard disk created in format 'VDI'. UUID: ****

c:\Program Files\Oracle\VirtualBox>VBoxManage.exe modifyhd "D:\dst.vdi" --resize 153600
0%...10%...20%...30%...40%...50%...60%...70%...80%...90%...100%