semantics

问题 Let's say I've a resource articles at /articles . These articles may have related articles, so I fetch them by GETting /articles/{id}/related . What should I return is there is no related articles? I can think of: 404 Not Found , maybe with an empty collection 204 No Content 200 Found with an empty collection Any advices? (please give arguments) By the way, it may applies to pagination. If I request page 3 of 2, then the page 3 will return an empty set, should It be a 404 ? 回答1: 404 is not

问题 I'm trying to get a simple synonym database up and running, so I can find synonyms of words the user entered (nothing else!). For this I grabbed a copy of the Wordnet sql thesarus (http://wnsql.sourceforge.net/), but now I'm presented with all these tables, and I can't find any simple explanation for their content anywhere: adjpositions adjpositiontypes casedwords lexdomains lexlinks linktypes morphmaps morphs postypes samples semlinks senses synsets vframemaps vframes vframesentencemaps

问题 I am self learning some parts of Essentials of Programming Languages . Essentials of Programming Languages defines that the expressed values are the possible values of expressions, and the denoted values are the values bound to variables. and We model memory as a finite map from locations to a set of values called the storable values . For historical reasons, we call this the store. The storable values in a language are typically, but not always, the same as the expressed values of the

问题 This question already has answers here : Mysterious for loop in python (5 answers) Closed 3 years ago . I understand what the in operator does in this code: some_list = [1, 2, 3, 4, 5] print(2 in some_list) I also do understand that i will take on each value of the list in this code: for i in [1, 2, 3, 4, 5]: print(i) I am curious if the in operator used in the for loop is the same as the in operator used in the first code. 回答1: They are the same concept but not the same operators. In the

问题 What is meant by ‘value semantics’, and what is meant by ‘implicit pointer semantics’? 回答1: 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.

问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 6 years ago . 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? 回答1: 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

问题 This question on 'How to tell if a PHP array is empty' had me thinking of this question Is there a reason that count should be used instead of empty when determining if an array is empty or not? My personal thought would be if the 2 are equivalent for the case of empty arrays you should use empty because it gives a boolean answer to a boolean question. From the question linked above, it seems that count($var) == 0 is the popular method. To me, while technically correct, makes no sense. E.g. Q

问题 What is the difference between syntax and semantics in programming languages (like C, C++)? 回答1: Syntax is about the structure or the grammar of the language. It answers the question: how do I construct a valid sentence? All languages, even English and other human (aka "natural") languages have grammars, that is, rules that define whether or not the sentence is properly constructed. Here are some C language syntax rules: separate statements with a semi-colon enclose the conditional expression

问题 How do I semanticly markup the headers in the article as presented in the picture below? I often run into this problem; where I have a header that is visually first, but is a subheading, intro header or less important then the main header. I could put it after the main header and move it above with CSS, but that isn't always a ideal solution. Another question: is there any special way to markup lead paragraphs? Not allowed? <article> <h2>New prodcut</h2> <h1>Launching our new x-series</h1> <p

问题 How do I semanticly markup the headers in the article as presented in the picture below? I often run into this problem; where I have a header that is visually first, but is a subheading, intro header or less important then the main header. I could put it after the main header and move it above with CSS, but that isn't always a ideal solution. Another question: is there any special way to markup lead paragraphs? Not allowed? <article> <h2>New prodcut</h2> <h1>Launching our new x-series</h1> <p