Double check singleton design pattern

public class MySingleton {
    private static object myLock = new object();
    private static volatile MySingleton mySingleton = null; // 'volatile' is unnecessary in .NET 2.0 and later
 
    private MySingleton() {
    }
 
    public static MySingleton GetInstance() {
        if (mySingleton == null) { // 1st check
            lock (myLock) {
                if (mySingleton == null) { // 2nd (double) check
                    mySingleton = new MySingleton();
                    
                }
            }
        }

        return mySingleton;
    }
}

Get SQL Server user's roles

SELECT
    p.NAME, m.NAME
FROM sys.database_role_members rm
JOIN sys.database_principals p ON rm.role_principal_id = p.principal_id
JOIN sys.database_principals m ON rm.member_principal_id = m.principal_id

IIS Windows Authentification Web Site Keeps Asking for Credentials

Problem:
Although the provided credentials are valid, IIS keeps prompting for credentials.

Solution:
 Disable the loopback check by setting the DisableLoopbackCheck registry key.

To set the DisableLoopbackCheck registry key, follow these steps:

1. Set the DisableStrictNameChecking registry entry to 1.
2. Click Start, click Run, type regedit, and then click OK.
3. In Registry Editor, locate and then click the following registry key:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa

   
   
4. Right-click Lsa, point to New, and then click DWORD Value.
5. Type DisableLoopbackCheck, and then press ENTER.
6. Right-click DisableLoopbackCheck, and then click Modify.
7. In the Value data box, type 1, and then click OK.
8. Quit Registry Editor, and then restart your computer.

Source: http://support.microsoft.com/kb/896861

Convert a Generic List to DataTable

public static DataTable ToDataTable<T>(this IList<T> data)

{

    PropertyDescriptorCollection props = TypeDescriptor.GetProperties(typeof(T));

 

    DataTable table = new DataTable();

    for(int i = 0 ; i < props.Count ; i++)

    {

        PropertyDescriptor prop = props[i];

        table.Columns.Add(prop.Name, prop.PropertyType);

    }

    object[] values = new object[props.Count];

    foreach (T item in data)

    {

        for (int i = 0; i < values.Length; i++)

        {

            values[i] = props[i].GetValue(item);

        }

        table.Rows.Add(values);

    }

    return table;       

}

 

Source: http://snipplr.com/view/53218/ 

JS namespaces

http://addyosmani.com/blog/essential-js-namespacing/

test

    apTRBF{i} = apTotRBF;
    clfsTRBF{i} = clfsOutRBF;
    accRBF{i} = accuracyRBF;
    ccRBF{i} = confusionRBF;

   
end


meanTotal = zeros(1,25);
for i=1:25
    meanTotal(i) = mean(accRBF{i});
end
mean(meanTotal)



savePath = sprintf('%ssave_HOF_baseline_4_pyr.mat',path);
save(savePath,'accRBF','ccRBF','apTRBF','clfsTRBF')

test

       image1 = image(1:80,1:100,:);
       image2 = image(1:80,100:200,:);
       image3 = image(1:80,200:300,:);
  image4 = image(1:80,300:400,:);
 
       image5 = image(80:160,1:100,:);
       image6 = image(80:160,100:200,:);
       image7 = image(80:160,200:300,:);
  image8 = image(80:160,300:400,:);
 
       image9 = image(160:240,1:100,:);
       image10 = image(160:240,100:200,:);
       image11 = image(160:240,200:300,:);
  image12 = image(160:240,300:400,:);
 
  image13 = image(240:320,1:100,:);
       image14 = image(240:320,100:200,:);
       image15 = image(240:320,200:300,:);
  image16 = image(240:320,300:400,:);
 
  %320x400

       descriptorsCN1 = extractColorNamingHist(image1,y,w2c)';
       descriptorsCN2 = extractColorNamingHist(image2,y,w2c)';
       descriptorsCN3 = extractColorNamingHist(image3,y,w2c)';
       descriptorsCN4 = extractColorNamingHist(image4,y,w2c)';
       descriptorsCN5 = extractColorNamingHist(image5,y,w2c)';
 
  descriptorsCN6 = extractColorNamingHist(image6,y,w2c)';
  descriptorsCN7 = extractColorNamingHist(image7,y,w2c)';
  descriptorsCN8 = extractColorNamingHist(image8,y,w2c)';
       descriptorsCN9 = extractColorNamingHist(image9,y,w2c)';
 
  descriptorsCN10 = extractColorNamingHist(image10,y,w2c)';
  descriptorsCN11 = extractColorNamingHist(image11,y,w2c)';
  descriptorsCN12 = extractColorNamingHist(image12,y,w2c)';
       descriptorsCN13 = extractColorNamingHist(image13,y,w2c)';
 
  descriptorsCN14 = extractColorNamingHist(image14,y,w2c)';
       descriptorsCN15 = extractColorNamingHist(image15,y,w2c)';
       descriptorsCN16 = extractColorNamingHist(image16,y,w2c)';    
 
       descriptorsCN = [descriptorsCN1 descriptorsCN2 descriptorsCN3 descriptorsCN4 descriptorsCN5 descriptorsCN6 descriptorsCN7 descriptorsCN8 descriptorsCN9 descriptorsCN10 descriptorsCN11 descriptorsCN12 descriptorsCN13 descriptorsCN14 descriptorsCN15 descriptorsCN16];
       descriptorsAllCN(j,:) = descriptorsCN;