namespaces

问题 I am working on developing a windows store app on my windows 8.1 system,64 bit (I need to deploy this app on my windows surface pro 3 tablet), technology being used is C#. I need to communicate through the RS-232 port. For this I am using the SerialPort class which falls under the namespace System.IO.Ports. But when I am including this in my C# code, I am getting the error - "The type or namespace name 'Ports' does not exist in the namespace 'System.IO' (are you missing an assembly reference?

问题 The super obvious way is to add reference to System.web I did that. It doesn't work. 回答1: Add a reference to System.Web.Extensions http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx Namespace: System.Web.Script.Serialization Assembly: System.Web.Extensions (in System.Web.Extensions.dll) 回答2: How to add System.Web.Extensions in Visual Studio 2012: Right-click your project. Click "Properties" Click the "References" tab on the left. Click the "Add"

问题 The super obvious way is to add reference to System.web I did that. It doesn't work. 回答1: Add a reference to System.Web.Extensions http://msdn.microsoft.com/en-us/library/system.web.script.serialization.javascriptserializer.aspx Namespace: System.Web.Script.Serialization Assembly: System.Web.Extensions (in System.Web.Extensions.dll) 回答2: How to add System.Web.Extensions in Visual Studio 2012: Right-click your project. Click "Properties" Click the "References" tab on the left. Click the "Add"

问题 I don't mind the using directives which are automatically created when the script is created. Those are fine. What I'm talking about are the using directives which are automatically generated at the top of the script while I'm coding as soon as I refer to a type which is out of scope. A pox upon the silent fiends! To clarify, currently if I try including a type which exists in some namespace which is not yet declared as 'using' in the script, said namespace will get auto-added to the top of

问题 I don't mind the using directives which are automatically created when the script is created. Those are fine. What I'm talking about are the using directives which are automatically generated at the top of the script while I'm coding as soon as I refer to a type which is out of scope. A pox upon the silent fiends! To clarify, currently if I try including a type which exists in some namespace which is not yet declared as 'using' in the script, said namespace will get auto-added to the top of

问题 I got following repsonse from a Web service call, I tried to unmarshal the same using JAXB to map it to a java class. I was getting unmarshal exception while doing so. <?xml version="1.0" encoding="UTF-8"?> <ns0:QueryByLNResponse xmlns:ns0="UIS_CTMPeople_WS" xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <ns0:getListValues> <ns0:First_Name>Pradeep</ns0:First_Name> <ns0:Internet_E

问题 What is the actual difference between class library and a namespace? I know both are used to group together classes, namespace etc. Can anyone tell in which scenario should I use a class library and when to go for creating a new namespace. 回答1: Namespaces provide a notional separation for classes, class libraries provide a physical separation (in windows think a standalone dll). Class libraries are useful for when you want to wrap up functionality that can be shared with other projects.

问题 I'm trying to use PHP namespaces for the first time and can't even get a very basic example working with 2 files. Here's my directory setup: /Framework/ /Framework/index.php /Framework/Models/TestModel.php And here's the code behind the two files. index.php: namespace Framework; use \Framework\Models\TestModel; $model = new TestModel(); $model->test(); TestModel.php: namespace Framework\Models; class TestModel { public function test() { print("test"); } } The error is simply that it cannot

问题 I've set up and been regularly updating my R package to GitHub following Hadley's extensive documentation about Devtools, Roxygen2 etc., on my laptop. Yesterday I decided to use my main PC instead and am now looking to push changes up to GitHub. I got the following error after entering document() : Error: 'Adult_Females' is not an exported object from 'namespace:gbm.auto' Adult_Females is the name of the first data file in /Data. According to this (scroll down to 'Data') "files that live in

问题 I am trying to make a package but when I run document() it prints NAMESPACE not generated by roxygen2. Skipped. I am trying to use ggplot2,XML, R6 packages in my functions. I am importing them in the following way: #' @rdname visualization #' @param hist_data A table of weather variables with PWS created by hist_data function #' @param variable A character string of variable name #' @examples #' table <- getWeather(city = "San Francisco", state="CA") #' please <- getConditionsTable(table,