It allows the differentiation of bitwise const and logical const. Logical const is when an object doesn’t change in a way that is visible through the public interface, like your locking example. Another example would be a class that computes a value the first time it is requested, and caches the result. Since c++11 mutable … Read more
Just to clarify something that came up in some of the other answers… There is no requirement that the initializer list be in either the source (.cpp) or header (.h) file. In fact, the compiler does not distinguish between the two types of files. The important distinction is between the contructor’s declaration and it’s definition. … Read more
All functions are also descriptors, so you can bind them by calling their __get__ method: bound_handler = handler.__get__(self, MyWidget) Here’s R. Hettinger’s excellent guide to descriptors. As a self-contained example pulled from Keith’s comment: def bind(instance, func, as_name=None): “”” Bind the function *func* to *instance*, with either provided name *as_name* or the existing name of … Read more
According to the Java class file specification the limit is 65535: 4.10 Limitations of the Java Virtual Machine The following limitations of the Java virtual machine are implicit in the class file format: The number of methods that may be declared by a class or interface is limited to 65535 by the size of the … Read more
You can use the startswith CSS3 selector to get those divs: $(‘div[class^=”project”]’) To check one particular element, you’d use .is(), not hasClass: $el.is(‘[class^=”project”]’) For using the exact /project\d/ regex, you can check out jQuery selector regular expressions or use /(^|\s)project\d(\s|$)/.test($el.attr(“class”))
Foreach public method you need a C function. You also need an opaque pointer to represent your class in the C code. It is simpler to just use a void* though you could build a struct that contains a void* and other information (For example if you wanted to support arrays?). Fred.h ——————————– #ifdef __cplusplus … Read more
Here is a good set of guidelines for when to use properties vs methods from Bill Wagner (fixed link) Use a Property when all these are true: The getters should be simple and thus unlikely to throw exceptions. Note that this implies no network (or database) access. Either might fail, and therefore would throw an … Read more
The advantage of prototypal inheritance is that it potentially allows fancy metaprogramming in a straightforward way because the prototype chain is easily manipulated. This is a rather academic advantage because metaprogramming is the wrong answer 99% of the time. As an example, you could have a Javascript Key-Value Observer style data manipulation layer with a … Read more
A .class file is a compiled .java file. .java is all text and is human readable. .class is binary (usually). You compile a java file into a class file by going to the command line, navigating to the .java file, and running javac “c:\the\path\to\your\file\yourFileName.java” You must have a java SDK installed on your computer (get … Read more
You can simply assign a function as an expression and return proper class from there. Edit: there is also better solution for dynamic classes. Please see note below. Snippet from view: <div ng-class=”appliedClass(myObj)”>…</div> and in the controller: $scope.appliedClass = function(myObj) { if (myObj.someValue === “highPriority”) { return “special-css-class”; } else { return “default-class”; // Or … Read more