Functional programming for beginners
Happy New Year everyone; I hope you had a pleasant and relaxing festive holiday season. I sure did. I’m starting the new year off by giving a short — an hour long or so — talk on how you can … Continue...
View ArticleWhat is up with transparent identifiers? Part two
This will be my last post before I head off for my annual vacation in Canada; see you again in September for more Fabulous Adventures in Coding! Last time on FAIC I suggested a rule for translating...
View ArticleWhat is up with transparent identifiers? Part one
A query expression in C# is, as you probably know, just a syntactic sugar for a bunch of method calls. For example, from customer in customers where customer.City == "London" select customer.LastName...
View ArticleReal world async/await defects
Today I’m once again asking for your help. The headliner feature for C# 5 was of course the await operator for asynchronous methods. The intention of the feature was to make it easier to write...
View ArticleLowering in language design, part one
Programming language designers and users talk a lot about the “height” of language features; some languages are considered to be very “high level” and some are considered to be very “low level”. A...
View ArticleDynamic contagion, part two
This is part two of a two-part series on dynamic contagion. Part one is here. Last time I discussed how the dynamic type tends to spread through a program like a virus: if an expression of dynamic type...
View ArticleOut parameters and LINQ do not mix
What’s wrong with this code? var seq = new List { "1", "blah", "3" }; int tmp; var nums = from item in seq let success = int.TryParse(item, out tmp) select success ? tmp : 0; The intention …...
View ArticleWhat is the defining characteristic of a local variable?
If you ask a dozen C# developers what a “local variable” is, you might get a dozen different answers. A common answer is of course that a local is “a storage location on the stack”. But that is...
View ArticleDebunking another myth about value types
Here’s another myth about value types that I sometimes hear: “Obviously, using the new operator on a reference type allocates memory on the heap. But a value type is called a value type because it...
View ArticleClosing over the loop variable considered harmful, part two
(This is part two of a two-part series on the loop-variable-closure problem. Part one is here.) UPDATE: We are taking the breaking change. In C# 5, the loop variable of a foreach will be logically...
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