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How can you find the height of text on an HTML canvas?

The spec has a context.measureText(text) function that will tell you how much width it would require to print that text, but I can't find a way to find out how tall it is. I know it's based on the font, but I don't know to convert a font string to a text height. ...
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How to determine the first and last iteration in a foreach loop?

The question is simple. I have a foreach loop in my code: 20 Answers 20 ...
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keytool error :java.io.IoException:Incorrect AVA format

I am new to Android development; when I have been trying to sign the application I have got the following error. Can anyone help me on this issue? ...
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Combined area of overlapping circles

I recently came across a problem where I had four circles (midpoints and radius) and had to calculate the area of the union of these circles. ...
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Can Selenium interact with an existing browser session?

Does anybody know if Selenium (WebDriver preferably) is able to communicate with and act through a browser that is already running before launching a Selenium Client? ...
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“please check gdb is codesigned - see taskgated(8)” - How to get gdb installed with homebrew code si

I'm under osx 10.8.4 and have installed gdb 7.5.1 with homebrew (motivation get a new gdb with new features such as --with-python etc... ) ...
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What HTTP status response code should I use if the request is missing a required parameter?

I am thinking 412 (Precondition Failed) but there may be a better standard? 12 Answers ...
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Re-open *scratch* buffer in Emacs?

If I accidentally closed the scratch buffer in Emacs, how do I create a new scratch buffer? 16 Answers ...
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Can I use __init__.py to define global variables?

I want to define a constant that should be available in all of the submodules of a package. I've thought that the best place would be in in the __init__.py file of the root package. But I don't know how to do this. Suppose I have a few subpackages and each with several modules. How can I access th...
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How do I analyze a .hprof file?

I have a production server running with the following flag: - XX:+HeapDumpOnOutOfMemoryError 7 Answers ...