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Fabulous Adventures In Coding

Eric Lippert's Erstwhile Blog

Continuing to an outer loop

When you have a nested loop, sometimes you want to “continue” the outer loop, not the...

Author: Eric Lippert Date: 01/11/2010

Is there such a thing as too much precision?

Well, enough chit-chat, back to programming language design. Suppose you’re building...

Author: Eric Lippert Date: 01/07/2010

Constraints are not part of the signature

What happens here? class Animal { } class Mammal : Animal { } class Giraffe : Mammal { }class...

Author: Eric Lippert Date: 12/10/2009

What's the difference between covariance and assignment compatibility?

I've written a lot about this already, but I think one particular point bears repeating. As we're...

Author: Eric Lippert Date: 11/30/2009

The Purpose, Revealed

Interestingly enough, no one correctly guessed why I needed code in the compiler to transform a...

Author: Eric Lippert Date: 11/25/2009

Always write a spec, Part Two

Upon submitting that specification for review, even before seeing my code, Chris found a bug and an...

Author: Eric Lippert Date: 11/23/2009

Always write a spec, part one

Joel had a great series of articles many years ago about the benefits of writing functional...

Author: Eric Lippert Date: 11/19/2009

Closing over the loop variable considered harmful

(This is part one of a two-part series on the loop-variable-closure problem. Part two is here.)...

Author: Eric Lippert Date: 11/12/2009

Simple names are not so simple, Part Two, plus, volcanoes and fried foods

I've returned from a brief vacation, visiting friends on the island of Maui. I'd never been to that...

Author: Eric Lippert Date: 11/05/2009

Simple names are not so simple

C# has many rules that are designed to prevent some common sources of bugs and encourage good...

Author: Eric Lippert Date: 11/02/2009

I have a Fit, but a lack of Focus.

Here's a statement I read the other day about making comparisons between objects of reference type...

Author: Eric Lippert Date: 10/29/2009

Begging the question

In my last post I described the syllogism "Photogenic people look good in photograps; Michelle...

Author: Eric Lippert Date: 10/22/2009

What is this thing you call "thread safe"?

Caveat: I am not an expert on multi-threading programming. In fact, I wouldn't even say that I am...

Author: Eric Lippert Date: 10/19/2009

As Timeless As Infinity

User: Recently I found out about a peculiar behaviour concerning division by zero in floating point...

Author: Eric Lippert Date: 10/15/2009

Absence of evidence is not evidence of absence

Today, two more subtly incorrect myths about C#. As you probably know, C# requires all local...

Author: Eric Lippert Date: 10/12/2009

What's the difference between "as" and "cast" operators?

Most people will tell you that the difference between "(Alpha) bravo" and "bravo as Alpha" is that...

Author: Eric Lippert Date: 10/08/2009

Why No Extension Properties?

I'm frequently asked "you guys added extension methods to C# 3, so why not add extension properties...

Author: Eric Lippert Date: 10/05/2009

Why does char convert implicitly to ushort but not vice versa?

Another good question from StackOverflow. Why is there an implicit conversion from char to ushort,...

Author: Eric Lippert Date: 10/01/2009

String interning and String.Empty

Here's a curious program fragment: object obj = "Int32";string str1 = "Int32";string str2 =...

Author: Eric Lippert Date: 09/28/2009

Why is covariance of value-typed arrays inconsistent?

Another interesting question from StackOverflow: uint[] foo = new uint[10];object bar =...

Author: Eric Lippert Date: 09/24/2009

Why do ref and out parameters not allow type variation?

Here's a good question from StackOverflow: If you have a method that takes an "X" then you have to...

Author: Eric Lippert Date: 09/21/2009

West of House

West of HouseYou are standing in an open field west of a white house, with a boarded front...

Author: Eric Lippert Date: 09/17/2009

What's the difference between a partial method and a partial class?

Like "fixed" and "into", "partial" is also used in two confusingly similar-yet-different ways in C#....

Author: Eric Lippert Date: 09/14/2009

What's the difference between conditional compilation and the conditional attribute?

User: Why does this program not compile correctly in the release build? class Program { #if DEBUG...

Author: Eric Lippert Date: 09/10/2009

Sorry about the CAPTCHA

A quick metablogging note. Those of you who comment on this blog (6700+ comments and counting, thank...

Author: Eric Lippert Date: 09/10/2009

What's the Difference, Part Five: certificate signing vs strong naming

Both strong naming and digital signatures use public key cryptography to provide evidence about the...

Author: Eric Lippert Date: 09/03/2009

What's the Difference, Part Four: into vs into

The keyword "into" in a query comprehension means two different things, depending on whether it...

Author: Eric Lippert Date: 08/31/2009

What's the Difference? Part Three: fixed vs. fixed

I got an email the other day that began: I have a question about fixed sized buffers in C#: unsafe...

Author: Eric Lippert Date: 08/27/2009

Iterator Blocks Part Seven: Why no anonymous iterators?

This annotation to a comment in part five I think deserves to be promoted to a post of its own. Why...

Author: Eric Lippert Date: 08/24/2009

Queueing Theory In Action, plus, frogs

Well that was a lovely vacation. It got off to a poor start but then it improved dramatically....

Author: Eric Lippert Date: 08/20/2009

Four switch oddities

The C# switch statement is a bit weird. Today, four quick takes on things you probably didn't know...

Author: Eric Lippert Date: 08/13/2009

Precedence vs order, redux

Once more I'm revisting the myth that order of evaluation has any relationship to operator...

Author: Eric Lippert Date: 08/10/2009

Not everything derives from object

I hear a lot of myths about C#. Usually the myths have some germ of truth to them, like "value types...

Author: Eric Lippert Date: 08/06/2009

What's The Difference, Part Two: Scope vs Declaration Space vs Lifetime

"Scope" has got to be one of the most confusing words in all of programming language design. People...

Author: Eric Lippert Date: 08/03/2009

What's the difference, part one: Generics are not templates

Because I'm a geek, I enjoy learning about the sometimes-subtle differences between easily-confused...

Author: Eric Lippert Date: 07/30/2009

Iterator Blocks, Part Six: Why no unsafe code?

There are three good reasons to disallow unsafe blocks inside an iterator block. First, it is an...

Author: Eric Lippert Date: 07/27/2009

Iterator Blocks, Part Five: Push vs Pull

A while back I posted some commentary I did for the Scripting Summer Games where I noted that there...

Author: Eric Lippert Date: 07/23/2009

Iterator Blocks, Part Two: Why no ref or out parameters?

A long and detailed discussion of how exactly we implement iterator blocks would take me quite a...

Author: Eric Lippert Date: 07/13/2009

Iterator Blocks, Part One

There is a constant tension in language design between solving general problems and solving specific...

Author: Eric Lippert Date: 07/09/2009

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