terminology

What is 'Facet' in JavaEE?

梦想的初衷 提交于 2019-11-30 06:22:00
问题 I wonder not only what is Facet but also what is Facet 'in physical level' (as I understand it's not a separate jar, but what?)? I also wonder how can it affect my application after deploying. I'll explain on real example: I had 2 facets (which were created by IDE): Spring Facet and Web Facet (for jsf). I deployed it to Tomcat and my application worked fine. Then I added (by means of IDE) one more facet - JPA Facet. I redeployed application and.. it still worked fine :) So, I'm just curious

Use of the terms “queues”, “multicore”, and “threads” in Grand Central Dispatch

≯℡__Kan透↙ 提交于 2019-11-30 06:20:43
问题 I am trying to get my head around the concepts of Grand Central Dispatch. I want to understand these quotes from Vandad's book on Concurrent Programming. The real use for GCD is to dispatch tasks to multiple cores , without making you the programmer, worry about which core is executing which task. and At the heart of GCD are dispatch queues. Dispatch queues are pools of threads . and finally You will not be working with these threads directly. You will just work with dispatch queues,

What is Cloud computing? [closed]

风格不统一 提交于 2019-11-30 05:58:22
问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . Could anybody explain in plain words how Cloud computing works? I have read the Wikipedia article, but still not sure that I understand how cloud actually works. 回答1: Aside from the latest marketing term?

What is a multibyte character set?

不想你离开。 提交于 2019-11-30 04:45:24
Does the term multibyte refer to a charset whose characters can - but don't have to be - wider than 1 byte, (e.g. UTF-8) or does it refer to character sets which are in any case wider than 1 byte (e.g. UTF-16) ? In other words: What is meant if anybody talks about multibyte character sets? The term is ambiguous, but in my internationalization work, we typically avoided the term "multibyte character sets" to refer to Unicode-based encodings. Generally, we used the term only for legacy encoding schemes that had one or more bytes to define each character (excluding encodings that require only one

What is meant by framework, programming language and scripting language?

落花浮王杯 提交于 2019-11-30 04:39:28
What is meant by framework, programming language and scripting language? I think Daniel Pryden's points are excellent - I voted him up. I'd just like to add a couple of minor additions. Programming languages, like C and C++, used to have a compiling and linking step that rendered the source code into a machine-language form that was run by the operating system. Scripting languages, like the Unix Bourne, Korn, and C shell, were not compiled or linked like C and C++. (Thanks to Daniel Pryden's correction and citation of the Unix scripting languages.) Since virtual machines have become so common

What does SCM stand for? [closed]

不羁岁月 提交于 2019-11-30 04:30:07
In the software world, it seems that SCM is an unfortunately overloaded acronym. It can mean:- Source Code Management Software Configuration Management Which one of these is the dominant term? Do they mean the same thing? To me Source Code Management is essentially synonymous with Version Control. Whereas Software Configuration Management is a larger subject, which potentially includes Build and Release Management as well. However looking on Wikipedia, it lists Subversion as a Software Configuration Management tool, which is at most only tangentially true. Build and Software Management has

SVN Terminologies - checkouts, working copy, property, repository

戏子无情 提交于 2019-11-30 03:41:06
问题 While I'm trying to learn how to use svn:externals , I'm having hard time understanding the differences of these terms. How are they different? working copy and checkout Sometimes it is useful to construct a working copy that is made out of a number of different checkouts . (source) property In Subversion, you declare externals definitions in groups using the svn:externals property . (source) repository As a result branches and tags are very quick to create, and take up almost no extra space

Difference between a statement and a query in SQL

孤人 提交于 2019-11-30 02:46:56
I still live in this ambiguity: conceptually what's the difference between a statement and a query in SQL? Can anybody give a definition for each of them? It would be useful, for example when choosing variables names inside programs in a way that will be clear for everybody. Thanks! ADDITIONALLY: How can I call a chunk of SQL code made by more than one statement where statements are separated by a semicolon ( ; )? Who already replied can edit his answer. Many thanks! A statement is any text that the database engine recognizes as a valid command. As of SQL-92 : An SQL-statement is a string of

Are there dictionaries in php?

帅比萌擦擦* 提交于 2019-11-30 02:37:35
For example: $names = {[bob:27, billy:43, sam:76]}; and then be able to reference it like this: $names[bob] Jacob http://php.net/manual/en/language.types.array.php <?php $array = array( "foo" => "bar", "bar" => "foo", ); // as of PHP 5.4 $array = [ "foo" => "bar", "bar" => "foo", ]; ?> Standard arrays can be used that way. Brént Russęll No, there are no dictionaries in php. The closest thing you have is an array. However, an array is different than a dictionary in that arrays have both an index and a key. Dictionaries only have keys and no index. What do I mean by that? $array = array( "foo" =

What's this UI pattern called?

扶醉桌前 提交于 2019-11-30 02:36:44
I'm trying to figure out what this sort of thing is called, and eventually how I can create one in a web browser. It looks like this (screenshot of the first app that came to mind): The specific component/pattern I'm looking for is the two list boxes ("Included Gear" and "Excluded Gear") that represent inclusion/exclusion of items from a set. I'm not really looking for the WPF name (if there is one) but it might be helpful. I am looking for the name of this thingy, if there is one, and if you really want to make my day, you can point me toward a jQuery or YUI way of making one of these dealies