naming-conventions

问题 What does sequenceA from Traversable stand for? Why is there capital A at the end? I've been learning Haskell for a few months now and this is one of those things that's been bugging me for a while. 回答1: The "A" stands for Applicative , as in the constraint in sequenceA 's type: sequenceA :: (Traversable t, Applicative f) => t (f a) -> f (t a) That the "A" is there is fruit of a historical accident. Once upon a time, neither Applicative nor Traversable existed in Haskell. Nonetheless, a

问题 I'm a web developer with no formal computing background behind me, I've been writing code now some years now, but every time I need to create a new class / function / variable, I spend about two minutes just deciding on a name and then how to type it. For instance, if I write a function to sum up a bunch of numbers. Should I call it Sum() GetSum() getSum() get_sum() AddNumbersReturnTotal() I know there is a right way to do this, and a link to a good definitive source is all I ask :D Closed as

问题 I'm designing a namespace to hold a set of classes that will handle user related tasks for a several different applications. (Log-in, authenticate etc) The problem is the namespace will be called Fusion.User but then it requires a class in that namespace that makes sense to call User . Should you have a class with the same name as the namespace? Or am I taking the wrong approach here? 回答1: Having class named in the same way as the name space (package) may lead to a thought that class is

问题 Does a class name, say UIImage+Something or UIImageView+Somethingelse , mean that it acts like a custom UIImage or UIImageView ? 回答1: I think you are looking at the file names of Categories, not Classes. The plus character + is not allowed in class names or any other identifier in Objective-C. An Objective-C category is a way of adding methods (but not instance variables) to a class you don't necessarily have the source to. For example, if you frequently want to make upside-down copies of

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 10 months ago . I ran my program successfully when declaring a class name starting with a lower case letter. I don't understood why it is asked to start with first capital letter. 回答1: You can declare it with lower case, but the convention is to start with a capital letter. The conventions

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 10 months ago . I ran my program successfully when declaring a class name starting with a lower case letter. I don't understood why it is asked to start with first capital letter. 回答1: You can declare it with lower case, but the convention is to start with a capital letter. The conventions

问题 Most programmers know of a thing called 'Hungarian Notation', each variable has a nice prefix to denote its data type, i.e. bIsExciting = false; // Boolean strName = "Gonzo"; // String iNumber = 10; // Integer While this style of notation has fallen out of favor, I am seeing (at work, internet, etc.) a lot of data type indicators added as a ' suffix ' to variable names, i.e. NameStr = "Gonzo"; // String NumberInt = 10; // Integer MyRideBike = new Bike(); // Bicycle Is there a name for this,

问题 Most programmers know of a thing called 'Hungarian Notation', each variable has a nice prefix to denote its data type, i.e. bIsExciting = false; // Boolean strName = "Gonzo"; // String iNumber = 10; // Integer While this style of notation has fallen out of favor, I am seeing (at work, internet, etc.) a lot of data type indicators added as a ' suffix ' to variable names, i.e. NameStr = "Gonzo"; // String NumberInt = 10; // Integer MyRideBike = new Bike(); // Bicycle Is there a name for this,

问题 I read that it is best practise to have table names in Pascal Case (ThisIsMyTableName). Therefor I would like to change my tables in MySQL. But neither phpmyadmin, nore SQL Manager 2005 for MySQL will let me. The names stay to appear in lowercase, as if I didn't to a change at all. Any suggestions to solve this problem? 回答1: I advice against mixed case because of problems with case sensitivity. A fully tested solution on one platform where case doesn't matter may actually fail when deployed

问题 I've been examining the code of CodeIgniter and CakePHP and I noticed that some of the methods in their classes are prefixed with an underscore _ or a double underscore __ . What's the purpose of that? 回答1: In the case where it is not any of PHP's magic methods, it is to indicate Visibility in lack of proper Visibility keywords: Cake Coding Conventions: As we cannot use PHP5's private and protected keywords for methods or variables, we agree on following rules: A protected method or variable