And now for Contravariance
Take the classes in the last post (First, Second, Third) and assume they are exactly the same in this example. In Covariance, we learned that whatever variable to you set equal to the return of a...
View ArticleSolve FizzBuzz Using Linq Extension Methods
So if you haven’t heard of the FizzBuzz test, it’s basically taking in a list of numbers and figuring out if they are divisible, cleanly, by two numbers. Say you have 3 and 5 and this is your list: 1 3...
View ArticleMore Fun With Linq
Say you have a class named BannedProgram and it has a collection of DayOfWeek and a string ProcessName. Now the collection of DayOfWeek is basically a way to set the days of the week it’s banned. With...
View ArticleDynamic Linq: OrderBy Using a String for a Property Name
Now this is kind of dangerous to do since there is no compile time check (Like most things set in markup) but say you want to sort a collection, using the Linq extension methods, but you don’t know...
View ArticleWhat Is Readable
So a couple of posts I read recently have been about readability of Linq, more so Linq query expressions versus the Linq methods. Don’t know what I mean? Expression: var result = from knowledge in Sean...
View ArticleWhat Is Readable Addon
Quick thought too about which to use due to readability: var you = from factor in seansAwesomeness select new FactorLite { Amount = amount; }; or you could do: Func<Person, FactorLite>...
View ArticleUhg It Won’t End
Still on the readability thing, but there was a second argument in the post that inspired now what is three posts of my own here. The question was should you use Linq based on people saying it’s more...
View ArticleCannot Resolve Method, Can’t Infer Return Type, and Funcs
So ran into this today and the answer was actually a lot easier to understand than I thought it would be. Say you want to order a list of objects by a number. Seems simple. Now if you have been paying...
View ArticleLinq Extension Methods Versus Linq Query Language… DEATHMATCH
Today I was writing out an example of why the extension methods are for the most part better to use than the querying language. Go figure I would find a case where that’s not entirely true. Say you are...
View ArticleUse Linq to Split a List: Skip and Take
Say what? Ok this is simple, and probably useless for most people but I thought I’d post it anyhow. Basically, say you have a huge list of something and you need to split it into smaller lists of...
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Linq Join Extension Method and How to Use It…
I don’t like using the query syntax when it comes to Linq to AnythingButTheKitchenSink . Not sure why. Mostly, I guess, is that I seem to have a liking for Funcs and Actions to the point of stupidity...
View ArticlePaging and the Entity Framework, Skip, and Take Part 3
Get the total count of pages. | Get the real page number. | Using Skip and Take to Page | The Actual Paging Controls Ok so the last two posts have been arguably useless, maybe more so than anything...
View ArticleDictionary Index Lookup Vs Contains Key Vs List Contains Vs Linq… Speed...
Ok so with MVC comes the use of Routes which calls in the need to compare request values to see which route to use. Now before I even bother with that headache (Although it’s getting better AND will be...
View ArticleLinq and Stack… Take versus Pop
So this might be filed under “Who f—ing cares” but I thought it was somewhat interesting. If you’ve ever used a Stack, you should be familiar with Pop and Peek. If not, here’s a little diddy from a guy...
View ArticleCreate An X Delimited String From A Char List Using Linq Aggregate
A quick example of how to use the Aggregate method to create a string of delimited members, or in this case characters. You might wonder why this example, or at least you should. It’s true, the...
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