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Can't create handler inside thread that has not called Looper.prepare()
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You're calling it from a worker thread. You need to call Toast.makeText() (and most other functions dealing with the UI) from within the main thread. You could use a handler, for example.
Look up Communicating with the UI Thread in the documentation. I...
How can I check a C# variable is an empty string “” or null? [duplicate]
I am looking for the simplest way to do a check. I have a variable that can be equal to "" or null. Is there just one function that can check if it's not "" or null?
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Omit rows containing specific column of NA
I want to know how to omit NA values in a data frame, but only in some columns I am interested in.
8 Answers
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How do you set the text in an NSTextField?
...but the -setStringValue: and -setTitleWithMnemonic: methods are not working. Any ideas?
7 Answers
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Git authentication fails after enabling 2FA
I just enabled 2FA (I can't think of any other changes I made) and git asked for my username and password. I provided both, but they were "wrong". I tried many of the solutions here: Git push requires username and password but that didn't work. In particular, when switching from https to ssh, the ...
Can we make unsigned byte in Java
...tegers above Byte.MAX_VALUE (127) you have to use an other integer type, like short, int or long.
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HashSet vs. List performance
...her than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class.
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Python function as a function argument?
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Peter Mortensen
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answered Jun 9 '11 at 7:48
Manuel SalvadoresM...
On design patterns: When should I use the singleton?
...e glorified global variable - becomes a gloried global class. Some say breaking object-oriented design.
19 Answers
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jQuery AJAX submit form
... edited Mar 18 '17 at 13:31
K DawG
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answered Dec 25 '09 at 1:36
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