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Most Useful Attributes [closed]
... useful. There are some predefined ones such as [Browsable(false)] which allows you to hide properties in the properties tab. Here is a good question explaining attributes: What are attributes in .NET?
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Pass a data.frame column name to a function
...l_name,col1,col2){
df$col_name <- df$col1 + df$col2
df
}
#Call foo() like this:
foo(dat,z,x,y)
The problem here is that df$col1 doesn't evaluate the expression col1. It simply looks for a column in df literally called col1. This behavior is described in ?Extract under the secti...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
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// do stuff
}
// doInBackground() et al.
}
Then, when calling the task, do something like:
new MyAsyncTask(true).execute(maybe_other_params);
Edit: this is more useful than creating member variables because it simplifies the task invocation. Compare the code above with:
MyA...
How can I specify a branch/tag when adding a Git submodule?
...hich commit their submodule directory points to. git submodule update actually merges in the new code.
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Django development IDE [closed]
I have done a little Django development, but it has all been in a text editor. I was curious what more advanced development tools others are using in their Django development.
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Java: Instanceof and Generics
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The error message says it all. At runtime, the type is gone, there is no way to check for it.
You could catch it by making a factory for your object like this:
public static <T> MyObject<T> createMyObject(Class<T> type) {
retu...
How to vertically center a container in Bootstrap?
I'm looking for a way to vertically center the container div inside the jumbotron and to set it in the middle of the page.
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What is “git remote add …” and “git push origin master”?
..., git is a distributed version control system. Most operations are done locally. To communicate with the outside world, git uses what are called remotes. These are repositories other than the one on your local disk which you can push your changes into (so that other people can see them) or pull from...
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
What is this error all about, and how would I go about solving it?
14 Answers
14
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What is event bubbling and capturing?
...utermost element and propagated to the inner elements.
Capturing is also called "trickling", which helps remember the propagation order:
trickle down, bubble up
Back in the old days, Netscape advocated event capturing, while Microsoft promoted event bubbling. Both are part of the W3C Document...