semantics

问题 Like two overlapping line segments, we can find infinite points of intersection. To enumerate all these points might not make sense, and we might just want to present that this collection is infinity. Floating point numbers have defined NegativeInfinity and PositiveInfinity . A number which represents count or ordinal seem not necessary to use floating point numbers, however, integers are not defined something to represent infinity. So I tried to implement an infinite enumerable. But I

问题 What is value semantics and reference semantics and what is the difference between them? Can you please show me with an example in c. I guess in reference semantics that you just send an pointer to another function then it is reference semantics? I find it hard to grasp what value semantics is? If I only use an int as an argument and then let say return an int from that function then the function uses value semantics? And how does side effects affect this? There must be other examples of

问题 having downloaded and trained SyntaxNet, I am trying to write a program that can open new/existed files, for example AutoCAD files, and save the files in an specific directory by analyzing the text: open LibreOffice file X . considering the output of SyntaxNet as: echo "save AUTOCAD file X in directory Y" | ./test.sh > output.txt Input: save AUTOCAD file X in directory Y Parse: save VB ROOT +-- X NNP dobj | +-- file NN compound | +-- AUTOCAD CD nummod +-- directory NN nmod +-- in IN case +--

问题 struct A { A(); A(const A&); A& operator =(const A&); A(A&&) = delete; A& operator =(A&&) = delete; }; struct B { B(); B(const B&); B& operator =(const B&); }; int main() { A a; a = A(); // error C2280 B b; b = B(); // OK } My compiler is VC++ 2013 RC. error C2280: 'A &A::operator =(A &&)' : attempting to reference a deleted function I just wonder why the compiler doesn't try A& operator =(const A&); when A& operator =(A&&) is deleted? Is this behavior defined by the C++ standard? 回答1: a = A(

问题 Are there some noticeable outcomes in terms of performance or other aspects to follow semantic HTML? Thanks 回答1: Not about performance Semantic markup isn't about performance, it's about meaning. Let's imagine two parallel universes. In Dumb HTML World , there is only one tag: <thing> . How would you specify where styles should be applied? How would browsers know how to render the page? How would screen readers for the blind differentiate between headlines and text and footnotes and menu

问题 Basically I just need something like github's header and footer. The header and footer have different colors than the body and they both go on forever. My center(main) div is fixed width, so that means I need to have a container div. What I have is something like this: http://jsfiddle.net/Q2gS4/ I would like to align the header, footer and container, but if the container was the only one with fixed width, it is hard to align it without being consistent. What I thought of doing was to create a

问题 I need ur suggestion in the following scenario. Lets say I have an UI something like Col1 Col2 A D B E C F Now to get this right now in my HTML I am using ..like <div class="col1"> <div>A</div> <div>B</div> .......... </div> <div class="col2"> <div>D</div> <div>E</div> .......... </div> But here I am using too much div..is it OK as per standard XHTML or should I use <li> ? Can somebody suggest with proper explanation, or maybe something else? Note: No use of Table Thanks. 回答1: It looks to me

问题 This question is about semantics. I have a client who says that the term "widget" should only be used when referring to a dynamic object that syndicates your own content on to a third party site. I believe widget can be used to refer to any self-contained dynamic object on a site (your own or a third party). However, my client says that if the object is on your own site, it is a "gadget." I'm not sure if there is an official definition, but I'm interested to know what is the common

问题 I installed the MediaWiki-extension Semantic MediaWiki recently. In this extension you can define properties. They are like categories for values. If I define two properties like this: [[StartYear::2000]] [[EndYear::2005]] Is it possible to make calculations based on these properties if I do a semantic search. For example: {{#ask: [[Category:Project]] [[EndYear]] - [[StartYear]] = 5 }} to get all projects with a duration of 5 years? best, UP 回答1: For this you would need to pre-process the

问题 How could I use owl:sameas to link between two ontologies? If I have Ontology A :c rdf:type owl:Class . and Ontology B :d rdf:type owl:Class . I want to link the two ontologies with the shared concepts (:c and :d), I've read about owl:sameas but that is used inside only one ontology between instances of similar classes within the ontology. I would like to link between class :c and class :d of the two ontologies, what is the solution for that? 回答1: I've read about owl:sameas but that is used