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Convert data.frame column to a vector?
...a frame is a list. When you subset a data frame using the name of a column and [, what you're getting is a sublist (or a sub data frame). If you want the actual atomic column, you could use [[, or somewhat confusingly (to me) you could do aframe[,2] which returns a vector, not a sublist.
So try run...
how to change an element type using jquery
... answered Dec 21 '11 at 1:52
Andrew WhitakerAndrew Whitaker
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How to Add Stacktrace or debug Option when Building Android Studio Project
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You can use GUI to add these gradle command line flags from
File > Settings > Compiler (Gradle-based Android Project)
For MacOS user, it's here
Android Studio > Preferences > Build, Execution, Deployment > Compiler
like this (add --stacktrace o...
How to save traceback / sys.exc_info() values in a variable?
I want to save the name of the error and the traceback details into a variable. Here's is my attempt.
5 Answers
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Why does Math.floor return a double?
...seems inconsistent with the Math.Round functions, which do return int/long and handle the special cases in a different way.
– zod
May 11 '11 at 11:08
1
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Check status of one port on remote host [closed]
I need a command line that can check the port status on a remote host. I tried ping xxx.xxx.xxx.xxx:161 but it doesn't recognize the "host". I thought it was a "good" answer until I did the same command against a host I know has that port open. This is for a batch file on Windows that will chec...
JavaScript seconds to time string with format hh:mm:ss
... call it on them too. I also found this answer that would remove the hours and minutes if they were not needed.
– alunsford3
May 25 '12 at 5:44
21
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Programmatically go back to the previous fragment in the backstack
...opBackStack() methods (there are several to choose from)
http://developer.android.com/reference/android/app/FragmentManager.html#popBackStack()
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How to implement a confirmation (yes/no) DialogPreference?
....setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(MainActivity.this...
Android Studio - Where can I see callstack while debugging an android app?
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At the bottom panel you should have "5: Debug". Click on it and select "Debugger -> Threads"
You may need to find the "Threads" icon on the far right, or even click the "Restore Layout" button on the left to restore this window.
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