subclass

问题 Customizing pprint.PrettyPrinter The documentation for the pprint module mentions that the method PrettyPrinter.format is intended to make it possible to customize formatting. I gather that it's possible to override this method in a subclass, but this doesn't seem to provide a way to have the base class methods apply line wrapping and indentation. Am I missing something here? Is there a better way to do this (e.g. another module)? Alternatives? I've checked out the pretty module, which looks

问题 I have code that looks like this: var baseClass = function() { // CODE var subClass = function() { // MORE CODE } } Adding methods to baseClass is fine, I just use baseClass.prototype.newMethod = function () { // NEW CODE } My question is how should I add methods to subClass? Is the only way to simply make it a public method? ######## EDIT ############## OK so I've rearranged the code so the subClass is outside the baseClass. I pass in baseClass so subClass can still access the properties of

问题 I have code that looks like this: var baseClass = function() { // CODE var subClass = function() { // MORE CODE } } Adding methods to baseClass is fine, I just use baseClass.prototype.newMethod = function () { // NEW CODE } My question is how should I add methods to subClass? Is the only way to simply make it a public method? ######## EDIT ############## OK so I've rearranged the code so the subClass is outside the baseClass. I pass in baseClass so subClass can still access the properties of

问题 Within my app, I have multiple UIView subclasses that depend on a model. Each of the classes adopting ' Restorable ' protocol which holds the superclass of the model. Each sub-model describes the specific UIView not-common properties. // Super-model public protocol StoryItem { var id: Int64? { get } } // Parent protocol public protocol Restorable: AnyObject { var storyItem: StoryItem? { get set } } // Specific protocol public struct TextItem: StoryItem { public var id: Int64? public var text:

问题 How can I put subclasses from the same baseclass into a list? I´m working with ASP.NET MVC3 and have created a basemodel-class with properties like name, age and so on. Now i have created submodels (subclasses) with more details. To easily handle the subclasses i want a list with the objects in it but how? I have read about interfaces or ICollection and so on but don´t know what´s the right choice and how to start :-( 回答1: Just create the list so it's of the base class: List<BaseClass> myList

问题 As mentioned here and here, this doesn't work anymore in numpy 1.7+ : import numpy A = numpy.array([1, 2, 3, 4], dtype=numpy.int16) B = numpy.array([0.5, 2.1, 3, 4], dtype=numpy.float64) A *= B A workaround is to do: def mult(a,b): numpy.multiply(a, b, out=a, casting="unsafe") def add(a,b): numpy.add(a, b, out=a, casting="unsafe") mult(A,B) but that's way too long to write for each matrix operation! How can override the numpy *= operator to do this by default? Should I subclass something? 回答1

问题 I've written some code in VBA to subclass a userform so that ultimately I can intercept WM_TIMER messages being dispatched to it. I'm doing this instead of specifying a TIMERPROC, as it allows me to use VBAs own error handling and calling methods to run callback functions. I'm using a userform rather than Application.hWnd because: I don't have to filter for my vs Excel/the host application's messages There are far too many messages going through Application.hWnd to be able to subclass it in a

问题 I'm making an iOS app in swift, and I'm trying to make a collectionView programmatically. I want to use my own subclass of UICollectionReusableView as a header for the CollectionView, because I need some buttons and a stretchable image in the header. SupView is the UICollectionReusableView. override func viewDidLoad() { super.viewDidLoad() let layout = UICollectionViewFlowLayout() layout.headerReferenceSize = CGSizeMake(self.view.frame.width, 200) someView = SupView(frame: CGRectMake(0, 0,

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . Write a program that prints the longest substring of s in which the letters occur in alphabetical order. For example, if s = 'azcbobobegghakl', then your program should print Longest substring in alphabetical order is: beggh In the case of ties, print the first substring. For example, if s = 'abcbcd', then your

问题 I'm currently building a tabbed iPhone application where each tab's view controller is an instance of UINavigationController , and where every subcontroller of every one of the UINavigationController instances is an instance of UITableViewController . Ideally, I'd like to subclass UINavigationController so that the controller for each tab is a subclass of UINavigationController that (in addition to having all the standard UINavigationController functionality, obviously) serves as the