semantics

What is meant by ‘value semantics’, and what is meant by ‘implicit pointer semantics’? Java is using implicit pointer semantics for Object types and value semantics for primitives. Value semantics means that you deal directly with values and that you pass copies around. The point here is that when you have a value, you can trust it won't change behind your back. With pointer semantics, you don't have a value, you have an 'address'. Someone else could alter what is there, you can't know. Pointer Semantics in C++ : void foo(Bar * b) ... ... b->bar() ... You need an * to ask for pointer semantics

While answering this question , I came to realize that I was not sure whether Perl's map can be considered a loop or not? On one hand, it quacks/walks like a loop (does O(n) work, can be easily re-written by an equivalent loop, and sort of fits the common definition = "a sequence of instructions that is continually repeated"). On the other hand, map is not usually listed among Perl's control structures, of which loops are a subset of. E.g. http://en.wikipedia.org/wiki/Perl_control_structures#Loops So, what I'm looking for is a formal reason to be convinced of one side vs. the other. So far,

I wish HTML could do something semantically equivalent to this; <dl class="main-list"> <definitionitem> <dt>Some Thing</dt> <dd>You know it!</dd> <dt>Another Thing</dt> <dd>Word.</dd> </definitionitem> <definitionitem> <dt>Stuff</dt> <dd>Alright!</dd> </definitionitem> </dl> However, since the closest I've come is something I'm not 100% satisfied with the semantics of; <div class="redundant-wrapper"> <dl class="main-list"> <dt>Some Thing</dt> <dd>You know it!</dd> <dt>Another Thing</dt> <dd>Word.</dd> </dl> <dl class="another-main-list"> <dt>Stuff!</dt> <dd>Alright!</dd> </dl> </div> I was

I'm trying to upgrade my app with Xcode5 but encountered a number of 'Semantic issues' in a third party library (being MagicalRecord). The quickest way to 'fix' this might be using the: #pragma GCC diagnostic ignored "-Wundeclared-selector" (from: How to get rid of the 'undeclared selector' warning ) compiler directive, but my gut-feeling says this is not the appropriate way to do this. A small code sample with the above error: + (NSEntityDescription *) MR_entityDescriptionInContext:(NSManagedObjectContext *)context { if ([self respondsToSelector:@selector(entityInManagedObjectContext:)]) {

I've heard a lot about the semantic web but I'm still not exactly sure what it is. How will it be different to the web we know now? How will it be different to the web we know now? Right now the HTML+CSS is centered more on structure and presentation. Semantics is about the meaning of the information. In semantic web you use shared ontologies to establish meaning (semantic) of the object and meaning of relations between the objects. Best known ontologies are: FOAF and Dublin Core . Typically semantics would be expressed in specialized language, such as RDF or OWL . RDF can be embedded within

Having a markup like this: <aside> <div class="widget"> <h2>Latest news</h2> <ul>...</ul> <a>more news</a> </div> <div class="widget"> <h2>Choose site theme</h2> <input type="select" /> </div> <div class="widget"> <h2>Newsletter subscription</h2> <form>...</form> </div> <div class="widget"> <h2>Related articles</h2> <ul>...</ul> </div> </aside> Which tag is more appropriate here: <div> or <section> ? Is section supposed to be used only inside <article> tag and never inside <aside> ? The HTML 5 spec does not prohibit you from using the section element inside of an aside element. The aside

From online documentation: cudaError_t cudaMemset (void * devPtr, int value, size_t count ) Fills the first count bytes of the memory area pointed to by devPtr with the constant byte value value. Parameters: devPtr - Pointer to device memory value - Value to set for each byte of specified memory count - Size in bytes to set This description doesn't appear to be correct as: int *dJunk; cudaMalloc((void**)&dJunk, 32*(sizeof(int)); cudaMemset(dJunk, 0x12, 32); will set all 32 integers to 0x12, not 0x12121212. (Int vs Byte) The description talks about setting bytes. Count and Value are described