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Can't create handler inside thread that has not called Looper.prepare()

... 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....
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Unicode, UTF, ASCII, ANSI format differences

... Going down your list: "Unicode" isn't an encoding, although unfortunately, a lot of documentation imprecisely uses it to refer to whichever Unicode encoding that particular system uses by default. On Windows and Java, this often means UTF-16; in many other places, it means UTF-8. Prope...
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How to format a duration in java? (e.g format H:MM:SS)

I'd like to format a duration in seconds using a pattern like H:MM:SS. The current utilities in java are designed to format a time but not a duration. ...
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Node JS Error: ENOENT

... "/tmp/test.jpg" is not the correct path – this path starts with / which is the root directory. In unix, the shortcut to the current directory is . Try this "./tmp/test.jpg" ...
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How to say “should_receive” more times in RSpec

... This is outdated. Please check Uri's answer below for 2 times: Project.should_receive(:find).twice.with(@project).and_return(@project) for exactly n times: Project.should_receive(:find).exactly(n).times.with(@project).and_return(@project) for at least n times: Project.shoul...
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Convert String to Type in C# [duplicate]

... the name of the type (with its namespace, of course) if the type is in mscorlib or the calling assembly. Otherwise, you've got to include the assembly name as well: Type type = Type.GetType("Namespace.MyClass, MyAssembly"); If the assembly is strongly named, you've got to include all that inform...
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How to print struct variables in console?

...instance of Project (in 'yourProject') The article JSON and Go will give more details on how to retrieve the values from a JSON struct. This Go by example page provides another technique: type Response2 struct { Page int `json:"page"` Fruits []string `json:"fruits"` } res2D := &...
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How do I modify a MySQL column to allow NULL?

...mns are nullable by default. As long as the column is not declared UNIQUE or NOT NULL, there shouldn't be any problems. share | improve this answer | follow |...
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Is there a foreach in MATLAB? If so, how does it behave if the underlying data changes?

Is there a foreach structure in MATLAB? If so, what happens if the underlying data changes (i.e. if objects are added to the set)? ...
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How to check for changes on remote (origin) Git repository?

... You could git fetch origin to update the remote branch in your repository to point to the latest version. For a diff against the remote: git diff origin/master Yes, you can use caret notation as well. If you want to accept the remote changes...