The art of simplicity: Load testing with Fiddler

The art of simplicity: Load testing with Fiddler

Reimplementing LINQ to Objects: Part 43 - Out-of-process queries with IQueryable - Jon Skeet: Coding Blog

Reimplementing LINQ to Objects: Part 43 - Out-of-process queries with IQueryable - Jon Skeet: Coding Blog

Interesting stuff throughout, but here's the summary at the end:

"This was really a whistlestop tour of the "other" side of LINQ - and without going into any of the details of the real providers such as LINQ to SQL. However, I hope it's given you enough of a flavour for what's going on to appreciate the general design. Highlights:

• Expression trees are used to capture logic in a data structure which can be examined relatively easily at execution time
• Lambda expressions can be converted into expression trees as well as delegates
• IQueryable and IQueryable form a sort of parallel interface hierarchy to IEnumerable and IEnumerable - although the queryable forms extend the enumerable forms
• IQueryProvider enables one query to be built based on another, or executed immediately where appropriate
• Queryable provides equivalent extension methods to most of the Enumerable LINQ operators, except that it uses IQueryable sources and expression trees instead of delegates
• Queryable doesn't handle the queries itself at all; it simply records what's been called and delegates the real processing to the query provider"

Reimplementing LINQ to Objects: Part 43 - Out-of-process queries with IQueryable - Jon Skeet: Coding Blog

Reimplementing LINQ to Objects: Part 43 - Out-of-process queries with IQueryable - Jon Skeet: Coding Blog

Interesting stuff throughout, but here's the summary at the end:

"This was really a whistlestop tour of the "other" side of LINQ - and without going into any of the details of the real providers such as LINQ to SQL. However, I hope it's given you enough of a flavour for what's going on to appreciate the general design. Highlights:

• Expression trees are used to capture logic in a data structure which can be examined relatively easily at execution time
• Lambda expressions can be converted into expression trees as well as delegates
• IQueryable and IQueryable form a sort of parallel interface hierarchy to IEnumerable and IEnumerable - although the queryable forms extend the enumerable forms
• IQueryProvider enables one query to be built based on another, or executed immediately where appropriate
• Queryable provides equivalent extension methods to most of the Enumerable LINQ operators, except that it uses IQueryable sources and expression trees instead of delegates
• Queryable doesn't handle the queries itself at all; it simply records what's been called and delegates the real processing to the query provider"

Formula for computing how many end users to interview

From http://www.measuringusability.com/blog/customers-observe.php:

"Stalking Customers

When I worked at Intuit (makers of TurboTax, Quicken & QuickBooks) we used a method called "follow-me-home." It was as effective as it was simple in identifying customer problems and needs.  

We went to a customer's house or workplace and watched them do what they do and recorded their behavior and problems they encountered and how they solved them.  Data from follow-me-homes were used for new product ideas and improving existing products. "

Scott Hanselman - Creating a NuGet Package in 7 easy steps - Plus using NuGet to integrate ASP.NET MVC 3 into existing Web Forms applications

Scott Hanselman - Creating a NuGet Package in 7 easy steps - Plus using NuGet to integrate ASP.NET MVC 3 into existing Web Forms applications

Also my comment on how to wire up the resultant .csproj file to have the MVC context menus:

Woot! I added the GUID {E53F8FEA-EAE0-44A6-8774-FFD645390401} to the ProjectTypeGuids node of the .csproj, and it's a bone fide MFC project with context menus in the Solution Explorer.

This is the result, with the new GUID underlined:

{E53F8FEA-EAE0-44A6-8774-FFD645390401};{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}

The perils of using Func instead of Expression in an IQueryable

This is sort of a LINQ 101 thing, but I haven't had much of an opportunity to use LINQ to SQL yet, believe it or not.

I learned the hard way: when using IQueryable against a database, any predicates handed around should be  Expression<func<type, bool>> instead of just Func<type, bool>. Func<type, bool> is evaluated in memory! That means that the entire table is fetched from the database, then filtered in memory. Bad, bad, bad!

7 Common Project Management Problems (And How to Solve Them)

7 Common Project Management Problems (And How to Solve Them)

Video Series: How To Give Great Presentations

Video Series: How To Give Great Presentations: "UGSS (Microsoft's User Group Support Services) have just published a video series that I recorded last year on How To Give Great Presentations. This free series of 8 videos covers the following subjects:-"