methods

问题 I am currently attempting to create a Java program that reads 81 integers (1-9) into an 9 X 9 matrix, and then tests to see if that matrix is a solution to a Sudoku puzzle. The parameters for a Sudoku solution are as follows: each number (1-9) must be represented in every row, column, and 3x3 square without any repetition in these areas. I have written a method to verify that the parameters are met for all rows and columns, however, I am struggling with coming up with an algorithm to verify

问题 In most Android apps, onCreate() is overridden with the first bit of code being super.onCreate(savedInstanceState) and I know this gathers the savedInstanceState Bundle and is neccessary for compilation but what about all of the constructors? onResume() , onStop() , onStop() etc. Which overridden methods have important super constructors you need to include? Is there a list somewhere? I see the super constructors included in some code, not in others.. I have included them sometimes myself,

问题 My program is a math game and will ask the user different questions in different levels. I would like to use a money rewards system that whenever they get one question right, $1000 will be added to their prize. I have tried to do this, however the money doesn't add when an answer is answered correctly. Help please on how I can go about fixing this. import javax.swing.*; import java.io.*; public class mathGame { public static void main (String [] args) throws IOException { BufferedReader

问题 The user has to pick 2 number to 1) Add 2) Subtract 3) Multiply 4) Divide 5) Quit. The 2 number that the user entry can be 0-9, a decimal point, or minus sign, and anything else is a error.I need to create a method to check the user entry , by using a true or false Boolean expression. what do I put in the Boolean expression Console.Write("Enter Number 1: ", num1); num1 = Convert.ToDouble(Console.ReadLine()); Console.Write("Enter Number 2: ", num2); num2 = Convert.ToDouble(Console.ReadLine());

问题 I am working on this mvc project following Rob Connery's storefront video series and applying the techniques. On the filtering and extensions methods, i started repeating myself a lot such as: public static Sponsor WithID(this IQueryable<Sponsor>qry, int ID) { return qry.SingleOrDefault(s => s.ID== ID); } public static Keyword WithID(this IQueryable<Keyword>qry,int ID) { return qry.SingleOrDefault(s => s.ID== ID); } .... To prevent this,I try to write a generic extension like this: public

问题 I am just learning Scala. I created a companion object (see code snippet below) where I define an operator, ^ , (to represent complex conjugation). I have to qualify it with the companion objects name inside the associated class. I was under the impression that I should have unqualified access to the methods of the companion. Can someone tell me if I have done something wrong? class CQ(val r: Q, val i:Q) { def +(z : CQ): CQ = { return new CQ(r + z.r, i + z.i) } def -(z: CQ): CQ = { return new

问题 I have 2 classes, MainViewController and 'FooView' for example. In MainViewController I have a method called -(void)doSearch I'm trying to call doSearch from Foo, is see in the log "doSearch" (NSLog) but the UIWebView doesn't response. Foo MainViewController *mainVc = [[MainViewController alloc] init]; [mainVc doSearch]; MainViewController - (void)doSearch { NSLog(@"doSearch"); [myWebView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://www.google.com/"]]]; } myWebView

问题 I am just busy with learning Java and my task is making a safecracker game. I need to do this game with classes and methods. But I came to until a point and I can't go further. Below I share my code and my questions. If you could have a look I will be so appreciate. import java.util.Random; import java.util.Scanner; public class Main { public static void main(String[] args) { entrance(); playGame(); quitGame(); } private static void entrance() { System.out.println("Welcome to the SafeCracker!

问题 I want to have dict / list to which I can add values, just like models can be added to the admin register in django ! My attempt : ( package -> __init__.py ) # Singleton object # __init__.py (Package: pack) class remember: a = [] def add(data): a.append[data] def get(): return a obj = remember() # models1.py import pack pack.obj.add("data") # models2.py import pack pack.obj.add("data2") print pack.obj.get() # We should get: ["data", "data2"] # We get : ["data2"] How to achieve the desired

问题 so I know you can add a custom field with the .add method...is there any way to REMOVE one? The reason is I'm only adding the fields if a component is selected, and if the user goes back I want to remove the fields, so that they don't multiply. :) Thanks! Here's my .iss: (I was planning to put the code in the OnBackButtonClick function...that's why it's there ;) ; Script generated by the Inno Setup Script Wizard. ; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES! #define