Posts Tagged ‘expressions’

Displaying a nested evaluation tree from Expression<Func>

February 13, 2009 2 comments

Updated: The downloadable source (see link below) is now tidied up a bit, and also displays any embedded string comparisons in a similar way to NUnit.

This might be useful as a way to write Assert statements in tests. Instead of requiring many different forms of Assert to capture values and intents, we could just have one Assert that accepts a lambda:

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Optimizing Aggregate for String Concatenation

December 10, 2008 5 comments

Linq lets you think in a very generally applicable way and solve a very wide variety of problems with a few key concepts. That’s a great thing. But it’s irritating when the elegant solution doesn’t perform as well as an ugly special case.

Using a combination of well-known Linq features I’m going to demonstrate that we already have the power to get the best of both worlds: speed and elegance.

One example that has always irked me (and which is simple enough to demonstrate the idea with) is this:

Enumerable.Range(0, size) 

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Categories: C#, expressions, lambdas, LINQ Tags: , , ,