semantics

问题 What does term "static semantics" mean in programming? What is relationship between static semantics, semantics and dynamic semantics? I know that semantics stands for checking if written code (without syntax errors) has any meaning. 回答1: Semantics is about meaning. It includes: the static semantics, which is the part that can be ascertained at compile time, including data typing, whether all variable are declared, which declaration applies to which variable in the case of scoping, what their

问题 What does term "static semantics" mean in programming? What is relationship between static semantics, semantics and dynamic semantics? I know that semantics stands for checking if written code (without syntax errors) has any meaning. 回答1: Semantics is about meaning. It includes: the static semantics, which is the part that can be ascertained at compile time, including data typing, whether all variable are declared, which declaration applies to which variable in the case of scoping, what their

问题 i've bought a book "learning the java SE 6 platform". i wonder what the word platform really means. cause isn't it just a bunch of classes that i can use. the JDK 1.6 node in Netbeans under Libraries. And what is API? isn´t it the same thing as platform. But doesnt library mean the same thing..a bunch of classes with some superclasses and so on? 回答1: The term "platform" is used to denote any collection of software, services and resources that, within a specific context, are considered a given

问题 It occurred to me today that although I've adopted and don't infrequently use the term "semantics" when referring to language elements and naming conventions, I don't have any sense of a formal definition. My attempt to find a formal definition in the programming domain made my eyes glaze over. I have a sense of its meaning from the contexts in which I've encountered it, and from its more common usage with respect to linguistics, and I typically use the term to refer to the meaning or

问题 Within an article-oriented page (such as a blog post), the <h1> element (level 1 heading) is commonly used to markup either: the blog title (i.e. the often-large site title at the top of the page, not to the <title> element), or the article title What is the best choice and why? To the site owner, who may want to shout out to the world the name of their site/blog, using a level 1 heading around the site title might seem to make sense. From the perspective of what you are trying to communicate

问题 What is the difference between a framework and an SDK? Take, for example, the MS platform SDK and the .NET framework. Both have API's, both hide their inner workings, and both provide functionality that may not be quickly/easily accessible otherwise (in other words, they serve a real-world purpose). So what's the difference? Is it primarily a marketing game of semantics, or are there actual differences in how developers are expected to interact with the software (and conversely, how the

问题 I know some languages emphasise words differently to English, e.g. via changing word endings rather than stressing words with inflection of the voice. If you are localising a site, would you trust that <strong> and <em> tags (and their placement) will have the same meaning in other languages — would you maintain this emphasis, check with your translator or leave them out? What I'm wondering is how this translates (excuse the pun) into the semantics of the web? — Strong and em tags carry

问题 Why is the flag that indicates a System property in Java -D ? Surely there is some semantics to this letter choice, but I can't guess what it is. 回答1: It is short for setting a system define. "define" debug to yes -Ddebug=yes There is some historical context, as other compilers use similar flags. For example, gcc uses -D to set a preprocessor define. gcc -D debug=yes test.c will compile test.c with a preprocessing environment where the preprocessor variable debug is set to yes . 回答2: "defines

问题 I've seen several examples of how developers structure their forms using tables, divs, and lists; all of which are not very semantic. What is the best method for structuring an HTML document so it breaks each label & input group to the next line and can be easily read - without the use of CSS ? (I feel that ol's and ul's are simply a replacement for tr's and td's. A form, in my opinion, is not a content or definition list) I almost feel like div's are the best format since a div is a clear

问题 I've run into a curious problem; I've got a form inside a <tr> , however the form refuses to wrap any tags inside it. I've made a quick JSFiddle here to play around with. Firebug reports that the form isn't wrapping anything: The <form> element is greyed out and not wrapping anything. The HTML for this test is below <table> <form> <tr> <td>Input</td> <td>Another input</td> </tr> <tr> <td colspan="4"><span>Other stuff</span></td> </tr> </form> <tr> <td> Rows not affected by the form </td> </tr