subclass

问题 How can I access state variable of class KeyBoardPlayer with an object of class KalaPlayer ? /** * An abstract class representing a player in Kala. Extend this class * to make your own players (e.g. human players entering moves at the keyboard * or computer players with programmed strategies for making moves). */ public abstract class KalaPlayer { /** * Method by which a player selects a move. * @param gs The current game state * @return A side pit number in the range 1-6 * @throws

问题 I am trying to add attributes to a subclass of pandas.DataFrame and they disappear after pickling and unpickling: import cPickle import pandas as pd class MyClass(pd.DataFrame): def __init__(self): super(MyClass, self).__init__() self.bar = 1 myc = MyClass() with open('myc.pickle', 'wb')as myfile: cPickle.dump(myc,myfile) with open('myc.pickle', 'rb')as myfile: b = cPickle.load(myfile) print b.bar Output: Traceback (most recent call last): File "test_df.py", line 14, in <module> print b.bar

问题 In my app, I use a label to display a specified color by set background color in a customized UITableViewCell (because this color maybe changed according incoming data from internet), after viewDidLoad, everything is ok, but when this cell is selected (highlighted) the color is cleared. After searching, I found out that some someone have to subclass UITableViewCell and overwrite setHighlight method to not clear label background color. I have tried but unlucky. So Does anybody know how to do

问题 Subclassed UITextView Here is h file @interface CTextView : UITextView { } @end Here is m file code #import "CTextView.h" @implementation CTextView - (BOOL)canBecameFirstResponder { return NO; } @end Here is first UIViewController file in which subclassed UITextview is using #import "First.h" #import "CTextView.h" textView = [[[CTextView alloc] initWithFrame:CGRectMake(0, 0, 320, 410)]autorelease]; [self.view addSubview:textView]; But still not able to prevent copy select all from UITextView.

问题 I have a tabbar application using storyboards. Tab 1 is a UIViewController with Mapview & Tab 2 is a UITableViewController. The appdelegate calls for a web fetch (via a custom class) and takes that web response and pareses it (via a custom class) and then puts the info in a CD-db (via a custom class). MapVC fetches results from the CD-db and populates an NSMutableArray (property) to be looped thru. The array contains a custom CD-db object with 2 coordinates which are used to create an

问题 I have two classes I would like to persist via NHibernate: - Cat, which has a name and an Id, - Kitten, which is a subclass of Cat (no extra public properties). For stupid reasons, I would like to know if it is possible to map Cat only? So that when I persist Kitten, it is saved as a Cat and when I reload it, it is loaded as a Cat. Additional constraints : - When trying, NHibernate crashed because it did not know Kitten. - However I do not want to add a discriminator value, as I do not want

问题 I need to work with a subclassed UIToolbar in the UINavigationController . I know this can be done via Interface Builder but I need it to be done programatically. The docs state that the UINavigationController toolbar property is readonly so I'm at a bit of a loss as to how I proceed. Related: Custom UINavigationController UIToolbar Background Image 回答1: A new init* method has been available since iOS 5 - (instancetype)initWithNavigationBarClass:(Class)navigationBarClass toolbarClass:(Class

问题 this is my first foray into subclassing with perl and I am wondering why I am getting this simple error... "Can't locate object method "prepare" via package "WebDB::st" at /home/dblibs/WebDB.pm line 19.". It seems to find the module WebDB ok, but not the prepare subroutine in ::st First here's my package (both packages are in one file, WebDB.pm) package WebDB; use strict; use DBI; sub connect { my $dbh = (DBI->connect ("DBI:mysql:test:127.0.0.1", "root","", { PrintError => 1, RaiseError => 0

问题 I have a storage class in Typescript, that implements Storage interface, say MyStorage . But it has too many methods, so I want to use it instead of MyStorage.getCandy - MyStorage.Candies.getCandies . How can the structure possibly look? I assume, something like export class MyStorage implements Storage { public constructor {} ... Candies: { getCandies() { ... } } Balls: { ... } } 回答1: You should consider whether such a huge object makes sense. Classes that do everything are generally a bad

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 6 years ago . Learn to Program: Crafting Quality Code Screenshot This is a video lecture from Coursera Learn to Program Crafting Quality Code Course. So there is a quiz during the video. class MyInt(int): # some code there They gave 4 answers where I need to choose a right one. I've choose my answers one by one but finally