assert

What is the difference between Assert.AreEqual and Assert.AreSame ? It means that AreSame() checks that they are the exact same object - if reference indicate the same object in memory. AreEqual() checks that objects has equal type and value. Equal objects can exist in two different places in memory. Scott Chamberlain Assert.AreEqual(a, b) is the same as Assert.IsTrue(Object.Equals(a, b)) Assert.AreSame(a, b) is the same as Assert.IsTrue(Object.ReferenceEquals(a, b)) (the only reason I knew is I just figured it out myself a few hours ago today because I needed to do a Assert.IsTrue(Object

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have been reading some source code and in several places I have seen the usage of assert . What does it mean exactly? What is its usage? 回答1: The assert statement exists in almost every programming language. When you do... assert condition ... you're telling the program to test that condition, and trigger an error if the condition is false. In Python, it's roughly equivalent to this: if not condition: raise AssertionError() Try it in the Python shell: >>> assert True # nothing happens >>> assert False Traceback (most recent call last):

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I was wondering, I am aware you can use assert to add facts or rules or whatever if you have declared the predicate to be -:dynamic , but this only allows the changes that are made to be kept in that session only, e.g. if you close the Prolog window then the database changes are lost. So I was wondering, is there any way of making it so that the assert and retract predicates can make permanent changes to the Prolog .pl file? Thanks 回答1: I can suggest you a very simple way of doing this. 1 ?- assert(a(1)). true. 2 ?- assert(a(2)). true. 3 ?-

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: Introduction The string module has a Template class, that lets you make substitutions in a string using a mapping object, for instance: >>> string . Template ( 'var is $var' ). substitute ({ 'var' : 1 }) 'var is 1' The substitute method may raise a KeyError exception, if an attempt is made to substitute an element that is missing from the mapping, for instance >>> string . Template ( 'var is $var and foo is $foo' ). substitute ({ 'var' : 1 }) KeyError : 'foo' or may raise a ValueError, if the template string is invalid, e.g. it

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: There is an endpoint, which is Dealer, and an endpoint which is Router. The Dealer is connected to the Router by TCP protocol. I set ZMQ_SNDHWM and ZMQ_RCVHWM to 1 for all of them. Note that the Dealer always sends to Router, but the Router does not receive. The questions are: When the Router is not set up, the Dealer just sends one message and is then obstructed. That is right, because ZMQ_SNDHWM is 1. But when I setup the Router, the Dealer can continue send about 4K msg and obstructed. Why? Another, if I let Router receive just

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a predicate that asserts things. When I use a findall it goes into an infinite loop. assertarv([N|R]):- assert(veiculos_troncos(N)), assertarv(R). assertarv([]). When I use findall(A,veiculos_troncos(A),NTr) , after having used the above predicate to assert many points (coordenates). This is what I get(using findall): Exit: (22) veiculos_troncos((-7, 6)) ? creep Redo: (22) veiculos_troncos(_G6719) ? creep Exit: (22) veiculos_troncos((-6, 6)) ? creep Redo: (22) veiculos_troncos(_G6719) ? creep Exit: (22) veiculos_troncos((-4, 4)) ?

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I am creating a view in my project which is a child class of CView. class CBaseGLView : public CView In oncreate function I am checking it null or not as below: int CBaseGLView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; m_hWnd = GetSafeHwnd(); if( ::IsWindow(m_hWnd)== NULL) { return 1; } m_pCDC= new CClientDC(this); m_hDC = m_pCDC->GetSafeHdc(); if (SetWindowPixelFormat()==FALSE) return 0; return 0; } When I am debugging with ApplicationVerifier I am getting a debug assertion in below

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm wondering if what I'm doing is an appropriate method of assertions. I'm trying to making something both concise and very correct for Python's style guides. try: assert self.port_number == 0 assert self.handle == None assert isinstance(port_number, int) or isinstance(port_number, float) assert port_number > 0 except AssertionError: return -1 *body of code* return 0 Above is an excerpt of my code that shows how I handle argument assertions. You can assume that I've covered all of the necessary assertions and the input is port_number. Is

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm trying to understand the usefulness of static_assert , and I want to know if it can help me in enforcing a design, and if so, how. I have a general template class that hides its own implementation inside another template class which is partially specialized based on the size of the template type. Here's a brief outline of this design: template < class T , size_t S = sizeof ( T )> struct Helper ; template < class T > struct Helper < T , sizeof ( long )> { static T bar (); }; // ... other specializations ... template < class T >

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I'm validating some xml files with the following xml schema: String xsdMarkup = "[...] <xsd:complexType name='connectionType'> <xsd:attribute name='SourceElement' type='guidType' use='required' /> <xsd:attribute name='TargetElement' type='guidType' use='required' /> <xsd:attribute name='GUID' type='guidType' use='required' /> <xsd:assert test='@SourceElement == 0' /> </xsd:complexType> [...] "; XmlSchemaSet schemas = new XmlSchemaSet(); schemas.Add("", XmlReader.Create(new StringReader(xsdMarkup))); Console.WriteLine("Validating doc ...");