global

I think there was a component that allowed to create global error handling. For example I myself throw exception when something bad happens, for example throw new ArgumentNullException("playlist is empty"); How can I catch it globally? MSDN is your friend: http://msdn.microsoft.com/en-us/library/system.windows.forms.application.threadexception.aspx You can accomplish this either through AppDomain.UnhandledException or Application.ThreadException . See the documentation for more details on what these events do and what the difference is for these events. The idea is that AppDomain

I want to define a list that a user may update through doing certain actions. I did this: runApp(list( ui=fluidPage( h1('Example') ,textInput('txt','','Text') ,actionButton('add','add') ,verbatimTextOutput('list') )#ui ,server=function(input,output,session) { s.list<-reactive(isolate(d.list())) d.list<-reactive({if (input$add == 0) return() isolate({ list(input$txt,unlist(s.list())) })#iso })#rea output$list<-renderPrint({ list(unlist(d.list())) })#list }#server ))#ruanApp But the list updates infinitely many times, does anyone know a way to make this work? jdharrison You can use

I'm writing a small gem, and I want to define a DSL-like method, pretty much the same as the desc and task methods in Rake . Rake defines them as private methods in the Rake::DSL module and then self.extend Rake::DSL to mix the module into the main object? (I'm a newbie and go ahead laugh if I'm wrong) what are the benefits by doing so? is it because making these methods private can prevent any other objects to use them (that is, to prevent something like some_obj.desc ) ? what if I define the methods in Kernel module Kernel private include Rake::DSL end Is there any difference? Just to extend

So, I was reading the Google testing blog, and it says that global state is bad and makes it hard to write tests. I believe it--my code is difficult to test right now. So how do I avoid global state? The biggest things I use global state (as I understand it) for is managing key pieces of information between our development, acceptance, and production environments. For example, I have a static class named "Globals" with a static member called "DBConnectionString." When the application loads, it determines which connection string to load, and populates Globals.DBConnectionString. I load file

It's slow to visit the maven official repositories from my country, so I want to try some local repositories first. Is it able to add them to some global gradle configuration file, that I can just use them in each gradle project, without modifying the project-scope build.gradle file? I would suggest to use the init.gradle script which is located in your home folder $HOME/.gradle/init.gradle which might contain the following content: allprojects { repositories { mavenLocal() maven { url "http://localhost:8081/nexus/content/groups/public/" } } } I guess that what are You looking for are init

What is the difference between initializing a variable as global var or calling globals().update(var) . Thanks When you say global var you are telling Python that var is the same var that was defined in a global context. You would use it in the following way: var=0 def f(): global var var=1 f() print(var) # 1 <---- the var outside the "def f" block is affected by calling f() Without the global statement, the var inside the "def f" block would be a local variable, and setting its value would have no effect on the var outside the "def f" block. var=0 def f(): var=1 f() print(var) # 0 <---- the

I know you can define a global variable in Objective-C by using "extern", but I just realized that the variables I had declared at the top of my .m file before my first method were also accidentally global (and that was causing some problems). I moved them into the @interface part of my header file, which I think correctly declares them as only existing within the class, which has solved some of my problems, but I am still a bit confused. What is the difference in declaring a variable as extern and putting it at the top of a .m file? Or do those result in the same thing? extern is a way of