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шаблон сайта, проданный 2.5k раз за год, принесший $50k создателю Познавательно - вот этот (http://bit.ly/rttpQP) шаблон сайта принес авторам за год 50 килобаксов (при цене $20).
Здорово, что дизайнеры могут зарабатывать так же, как и шароварщики - ничего не делая.

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Artificial intelligence (http://ai-class.org).

Databases (http://db-class.org)

Machine Learning (http://ml-class.org).

• Computer Science 101: http://www.cs101-class.org/
  
• Software Engineering for Software as a Service: http://www.saas-class.org/
  
• Human-Computer Interfaces: http://www.hci-class.org/
  
• Natural Language Processing: http://www.nlp-class.org/
  
• Game Theory: http://game-theory-class.org
  
• Probabilistic Graphical Models: http://www.pgm-class.org/
  

linq concatenate rows

we can use Aggregate methods to concatenate fields in rows as follow:

        var profiles = (from b in invoiceContext.bills
                        join p in invoiceContext.PaymentProfiles on 1 equals 1
                       where  b.ProfileID == p.Id || b.ProfileType == p.Id
                           select p.Name).ToList();

        if (profiles.Count() > 0)
        {
            BillingMethodLabel.Text = profiles.Aggregate((current, next) => current + ", " + next);
        }

hgignore visual studio example

# use glob syntax.
syntax: glob

# c-sharp
/bin
/obj
*.user
*.suo
_ReSharper.*
*.sln.cache

bin/**
bin/Debug/**
obj/*

linq join on multiple fields by OR sample

Linq doesn't allow to do on t1.field1=t2.field1 or t1.field2=t2.field2
therefor it can be done by using OR in where statement:

     
var profiles = (from b in invoiceContext.bills
        join p in invoiceContext.PaymentProfiles on 1 equals 1
        where  b.ProfileID == p.Id || b.ProfileType == p.Id
        select p.Name).ToList();