static-methods

I am trying to access a static member from a non-static function in the class, and I get an error saying Static member cannot be accessed off an instance variable this is how my code looks - class myClass { public static testStatic: number = 0; public increment(): void { this.testStatic++; } } From what I understand of static members/methods, we shouldn't access non-static members in static functions, but vice-versa should be possible. the static member is already created and is valid, so why can't I access from my non-static method? Access static members from inside the class the same way you

In StringBuilder class I can do like this: StringBuilder sb = new StringBuilder(); sb.append( "asd").append(34); method append returns StringBuilder instance, and I can continuosly call that. My question is it possible to do so in static method context? without class instance Yes. Like this (untested). public class Static { private final static Static INSTANCE = new Static(); public static Static doStuff(...) { ...; return INSTANCE; } public static Static doOtherStuff() { .... return INSTANCE; } } You can now have code like. Static.doStuff(...).doOtherStuff(...).doStuff(...); I would recommend

Conceptually, is it appropriate to use a static method (C#) when the method will only take inputs and reformat the input as the output? For example: public static string FormatString(string inputString){ return "some formatting" + inputString + "Some other formatting"; } If I were to have a few of these types of methods, would a static "utility" class be a good idea? I'd agree with the other answers so far that it certainly makes sense a lot of the time. Sometimes , you may want to actually give yourself a little more flexibility by defining an interface and implementing that with instance

Sorry for the unlearned nature of this question. If there's a simple answer, just a link to an explanation will make me more than happy. After 6 months programming I find static classes to be somewhat useful for storing routines that apply to many different classes. Here's a simplified example of how I use static classes, it's a class for parsing text into various things public static class TextProcessor { public static string[] GetWords(string sentence) { return sentence.Split(' '); } public static int CountLetters(string sentence) { return sentence.Length; } public static int CountWords

I'm still new to Guice and haven't used any DI frameworks before. After reading the official wiki and many other documents I'm still unable to wrap my head around it completely. In my particular case I want to write a EL taglib function that uses some other (to-be-injected) class. As all taglib functions have to be declared as static, I can't just @Inject my dependency via constructor or setter. I thought of using the requestStaticInjection() method described in http://code.google.com/p/google-guice/wiki/Injections#Static_Injections but I unable to get it to work and haven't been able to find

I am using some method to autoload helper files with functions. The only problem I am having now, is how to call the variables in that class. Because I am not instantiating it as an object, $this won't work. But what will? class some_helperclass { var $some_variable = '007'; public static function some_func() { //return 'all ok'; if (self::some_variable !== FALSE) { return self::ip_adres; } } I can call the function from anywhere now with the help of spl_autoload_register() . some_helperclass:: some_func(); You have to use self::$some_variable . Put the $ in there. http://www.php.net/manual/en

I need to call a static method of a class, but I only have a classname, not an instance of it. I am doing it this way. $class = new "ModelName"; $items = $class::model()->findAll(); It works on my computer, but when I move to the server, it throws an unexpected T_PAAMAYIM_NEKUDOTAYIM , so I think it actually expects model to be a variable instead of a method. PS: If it helps, it's Yii framework, so if there's another way to call the find() functions, it's ok to me. Thanks in advance This is because your server runs a version of PHP earlier than 5.3.0, in which this syntax is not supported.

I would like to know if you have a class with only static methods in it, does an actual instance of the class get created somewhere when you call 1st static method? This is somewhat confusing to understand in terms of memory management as you never actually call the constructor or create an instance of the method explicitly. If an instance does get created, I would like to better understand where this instance lives and for how long. No. Calling a static method does not require (or create) an instance of a class . See also JLS-8.4.3.2 static methods which says (in part) A method that is