conventions

问题 I've seen these two things lately and I'm a bit confused. var blah = new MyClass() { Name = "hello" } and var blah = new MyClass { Name = "hello" } Whats the difference? and why do they both work? Update: Does this mean that if i have something in a constructor which does some computation that i would have to call the first one?? 回答1: As far as I know, they're exactly equivalent. The C# specification (or at least Microsoft's implementation of it) allows you to omit the () when using the

问题 I learned from chapter 9 of Learn You A Haskell For Great Good that By convention, we don't usually specify a type declaration for main . As far as I can tell, this convention is widespread. However, if I compile, using the -Wall flag, a program that lacks a type signature for main , such as -- test.hs -- main :: IO () main = print (1 :: Int) GHC does issue a warning: $ ghc -Wall test.hs [1 of 1] Compiling Main ( test.hs, test.o ) test.hs:2:1: Warning: Top-level binding with no type signature

问题 I've been merrily writing events using custom delegate types and the generic Action delegate type, without really thinking about what I was doing. I have some nice extension helpers for Action and EventHandler which makes me tend to use those predefined delegate types rather than my own, but aside from that... Is there a good reason other than convention to favour EventHandler and EventHandler<T> over custom delegate types or generic Action delegate types? 回答1: The main advantage of the

问题 I've been merrily writing events using custom delegate types and the generic Action delegate type, without really thinking about what I was doing. I have some nice extension helpers for Action and EventHandler which makes me tend to use those predefined delegate types rather than my own, but aside from that... Is there a good reason other than convention to favour EventHandler and EventHandler<T> over custom delegate types or generic Action delegate types? 回答1: The main advantage of the

问题 Whats the difference between class methods and Instance methods. Why do we need them separately? Can somebody please explain? Class and Instance Methods • Instances respond to instance methods - (id)init; - (float)height; - (void)walk; • Classes respond to class methods + (id)alloc; + (id)person; + (Person *)sharedPerson; Taimur 回答1: An instance method is only available on an instance of the class, while a class method does not need an instance but is available on the class. Class Methods are

问题 Outside of benefiting from Adaptive Rendering for alternate devices, does it ever make sense to write all of this code: writer.WriteBeginTag("table"); writer.WriteBeginTag("tr"); writer.WriteBeginTag("td"); writer.Write(HtmlTextWriter.TagRightChar); writer.WriteEncodedText(someTextVariable); writer.WriteEndTag("td"); writer.WriteEndTag("tr"); writer.WriteEndTag("table"); When StringBuilder could build the same thing with simply this: sb.Append("<table><tr><td>"); sb.Append(someTextVariable);

问题 Locked . This question and its answers are locked because the question is off-topic but has historical significance. It is not currently accepting new answers or interactions. There are a couple of questions on Stackoverflow on whether there is any research or studies into what is the best coding convention/style. That's not what this question is about. This question is about whether there are any studies that research whether there are any advantages, productivity gains or other positive

问题 Being new to Rails, I am having a difficult time finding a website or reference that gives a run down summary of Ruby on Rails. I understand MVC, ActiveRecord, and that sort of stuff on a basic level, but I am having a hard time understanding some of the relationships and fundamentals. For instance: What are all naming conventions I need to be aware of? How should controller actions be structured and named? What are the best ways to render information in a view (via :content_for or render a

问题 Being new to Rails, I am having a difficult time finding a website or reference that gives a run down summary of Ruby on Rails. I understand MVC, ActiveRecord, and that sort of stuff on a basic level, but I am having a hard time understanding some of the relationships and fundamentals. For instance: What are all naming conventions I need to be aware of? How should controller actions be structured and named? What are the best ways to render information in a view (via :content_for or render a

问题 I have two tables products and product_categories that are associated through a third table, products_categories_products , according to CakePHP BelongsToMany conventions (Edit: these associations are established in ProductsTable.php and ProductCategoriesTable.php ). I want to generate a list of product categories, using the image from the best selling products to represent each category. I can achieve my desired outcome using the following function: public function findImages(Query $query,