class | 易学教程

C# Reflection: How to Emit a class

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问题 I have a class, ReferenceObject, that I want Emitted into the dll I create. How do I do this without writing every method with Emit? I basically want this class added to the dll I generate. Here is the class: public class ReferenceObject { private readonly int value; public ReferenceObject(int pValue) { value = pValue; } public override string ToString() { return value.ToString(); } public int Value() { return value; } public int ID() { return value; } #region == Operator public static bool

如何控制标签切换显示？

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第一种方法:原生JS实现！部分html代码 < div class = " seckill " > < div class = " seckill-head " > </ div >  < div class = " seckill-container " > < div class = " seckill-nav " > < ul id = " tabs " > < li class = " active " > < em > 14:00 </ em > < span > < em > 抢购中 < br > 距结束 00:36:28 </ em > </ span > </ li > < li > < em > 20:00 </ em > < span > 即将开始 </ span > </ li > < li > < em > 20:00 </ em > < span > 即将开始 </ span > </ li > < li > < em > 22:00 </ em > < span > 明日开始 </ span > </ li > < li > < em > 00:00 </ em > < span > 明日开始 </ span > </ li > </ ul > </ div > < div id = " lists " class

What happens when you inherent from a module instead of a class in Python?

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问题 I recently came across this question. import Object class Visitor(Object): def __init__(self): super(Visitor,self).__init__() def visit(self, obj): pass def getIsDone(self): return False isDone = property(fget =lambda self:self.getIsDone()) I get this error: TypeError: module.__init__() takes at most 2 arguments (3 given) and its answer: class A:pass print(A) #outputs <class '__main__.A'> import urllib print(urllib) #outputs <module 'urllib' from '/usr/lib/python3.2/urllib/__init__.py'> Your

Prevent calling base class implemented interface method in the derived class C#

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问题 Is it possible to implement an interface in a base class and allow calling/overriding the implemented method in the first derived class level but prevent calling it from any further derived classes? public interface IInterfaceSample { bool Test(); } public class Base: IInterfaceSample { public virtual bool Test() { return True; } } public class Sub1: Base { //I need to be able to override the Test method here public override bool Test() { return True; } } //Under a separate project: public

Prevent calling base class implemented interface method in the derived class C#

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Accessing class constants from instance stored in another class

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问题 I have a class defined which has several constants defined through `const FIRST = 'something'; I have instantiated the class as $class = new MyClass() then I have another class that takes a MyClass instance as one of it's constructors parameters and stores it as $this->model = $myClassInstance; This works fine. But I am wondering how I can access the constants from that instance? I tried case $this->model::STATE_PROCESSING but my IDE tells me Incorrect access to static class member. and PHP

How can i make a “dice” that randomly generates a number 1-6 EACH time it is used?

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问题 Right now i am using int die = (int)(6.0 * Math.random()) + 1; This does not work for the loop i am trying to create. This is the method i am using. public void computerRoll() { do { roll(); System.out.println("Roll:"+ die); computerScore += die; } while (computerScore <= 20 && die >=2 && die <=6 ); if (computerScore >=20) computerHold(); if (die == 1) switchTurn(); } The roll() method just simply has the previous line of code in it, "int die = (int)(6.0 * Math.random()) + 1;" i have tried

How can i make a “dice” that randomly generates a number 1-6 EACH time it is used?

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Haskell - Having trouble understanding a small bit of code

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问题 I am doing a school task where I am given a small bit of sample code which I can use later. I understand 90% of this code but there is one little line/function that I for the life of me can't figure out what it does (I am very new to Haskell btw). Sample code: data Profile = Profile {matrix::[[(Char,Int)]], moleType::SeqType, nrOfSeqs::Int, nm::String} deriving (Show) nucleotides = "ACGT" aminoacids = sort "ARNDCEQGHILKMFPSTWYVX" makeProfileMatrix :: [MolSeq] -> [[(Char, Int)]]

Infix to postfix conversion in java

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问题 I have a java class that converts infix expression to postfix. I have managed to make the class run without errors but it is not giving me the right output. The output is suppose to be in form : InToPost: converting expressions from infix to postfix... [A, +, B] [A, +, B, *, C] [A, +, B, *, C, +, D] [(, A, +, B, ), *, C] [(, A, +, B, ), /, (, C, -, D, )] [(, (, A, +, B, ), *, C, -, (, D, -, E, ), )] InToPost: emitting postfix expressions... A B + A B C * + A B C * + D + A B + C * A B + C D -