namespaces

问题 I successfully compiled on Windows a code that should be crossplatform. Now when compiling it in Xcode with Mac OS X, I get: std::valarray<float> v(32); ... std::sort(begin(v), end(v)); # Use of undeclared identifier 'begin' std::sort(std::begin(v), std::end(v)); # No member named 'begin' in namespace 'std' std::sort(std::valarray::begin(v), std::valarray::end(v)); # Idem, error as well Why does the error No member named 'begin' in namespace 'std' happen? 回答1: std::begin was introduced with C

问题 I am trying to make a WebForms project and ASP.NET MVC per this question. One of the things I've done to make that happen is that I added a namespaces node to the WebForms web.config : <pages styleSheetTheme="Default"> ... <namespaces> <add namespace="System.Web.Mvc"/> <add namespace="System.Web.Mvc.Ajax"/> <add namespace="System.Web.Mvc.Html"/> <add namespace="System.Web.Routing"/> </namespaces> </pages> However, when I try to start the project, I get an error stating: " Compiler Error

问题 I'm having trouble getting NATUPnP 1.0 Type Library to work with Framework 3.5 in Visual Studio 2010. If I use .Net 4.0, it works just fine, but with .Net 3.5, NATUPNPLib's namespace looks excactly like NETCONLib's. For example this Port Forwarding Management Application sample from this site: http://pietschsoft.com/post/2009/02/05/NET-Framework-Communicate-through-NAT-Router-via-UPnP.aspx ..is using .Net 3.5, but I can't get it to compile in Visual Studio 2010 unless I change it to .Net 4.0.

问题 When declaring the following namespace: <?php namespace Example\3000; I got this error: Parse error: syntax error, unexpected '3000' (T_LNUMBER), expecting identifier (T_STRING) in [...] So I wondered whether a namespace in PHP may start with a number? 回答1: No, it must not. It must start with a letter. It took me a while to find this in a comment on PHP.net. To use numbers e.g. for versioning it is necessary to prepend letters, e.g. like in the following: <?php namespace Example\V_3000; 回答2:

问题 NB: This question assumes Python 2.7.3. I'm looking for a sane approach to dynamically modify a function's local namespace, preferably in a way that adds the least clutter to the body function. What I have in mind would look something like this: import os from namespace_updater import update_locals def somefunc(x, y, z): # ... # ... # this and that # ... # ... if os.environ.get('FROBNICATE'): from frobnitz import frobnicate update_locals(frobnicate(locals())) # # life goes on, possibly with

问题 NB: This question assumes Python 2.7.3. I'm looking for a sane approach to dynamically modify a function's local namespace, preferably in a way that adds the least clutter to the body function. What I have in mind would look something like this: import os from namespace_updater import update_locals def somefunc(x, y, z): # ... # ... # this and that # ... # ... if os.environ.get('FROBNICATE'): from frobnitz import frobnicate update_locals(frobnicate(locals())) # # life goes on, possibly with

问题 I'm making a forum application with various levels of authorization, one of which is a Monitor. I am doing this by extending my User class, and I plan on fine tuning this with "-ship" classes (e.g. administratorship, authorship, moderatorship, etc.). Apparently the Monitor class is part of ruby mixin. How do I keep my resource name without the collisions? 回答1: Some possibilities: avoid the require 'monitor.rb' call which is pulling in the standard Monitor instance do some runtime magic to

问题 In a project I am working on I am structuring my code as follows MyLib = { AField:0, ASubNamespace:{ AnotherField:"value", AClass:function(param) { this.classField = param; this.classFunction = function(){ // stuff } } }, AnotherClass:function(param) { this.classField = param; this.classFunction = function(){ // stuff } } } and so on like that to do stuff like: var anInstance = new MyLib.ASubNamespace.AClass("A parameter."); Is this the right way to go about achieving namespacing? Are there

问题 I have done a TONE of research and still have just hit a dead end :( Heres my XML file (test.xml): <bookstore> <book genre="autobiography"> <title>The Autobiography of Benjamin Franklin</title> <author> <first-name>Benjamin</first-name> <last-name>Franklin</last-name> </author> <price>8.99</price> </book> <bk:book genre="novel" bk:genre="fiction" xmlns:bk="http://purl.org/dc/elements/1.1/"> <bk:title>The Confidence Man</bk:title> <bk:author> <bk:first-name>Herman</bk:first-name> <bk:last-name

问题 Is it possible use multiple classes under the same namespace, in the same file? I want to do something like this: <?php namespace MyNamespace\Helpers\Exceptions use Exception; class CustomException1 extends Exception{} class CustomException2 extends Exception{} class CustomException3 extends Exception{} to avoid using one single file for each custom exception class. The problem is, when I try to use, in another class, one of the custom exceptions, use MyNamespace\Helpers\Exceptions