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How to check if a file is empty in Bash?

I have a file called diff.txt. Want to check if it is empty. Did something like this but couldn't get it working. 10 Answe...
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cocktail party algorithm SVD implementation … in one line of code?

...guess this is an estimation and simplification of a more strict expression called spectrogram. Singular Value Decomposition on spectrogram is used to factorize the signal into different components based on spectrum information. Diagonal values in s are the magnitude of different spectrum component...
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How to create a database from shell command?

...ame "oc_local" for the database (change it if you want your database to be called in a different way)------> mysql -u root -p -e "create database oc_local"; – pablofiumara Nov 12 '13 at 1:48 ...
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What is causing this error - “Fatal error: Unable to find local grunt”

...the old one(v0.3).today I'm unintsalled it,and install the new grunt(v0.4) called Grunt-CLI.something has changed.. – Ryan Yiada Dec 18 '12 at 7:09 ...
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How to access environment variable values?

...ort os >>> print os.environ['PYTHONPATH'] Traceback (most recent call last): File "<console>", line 1, in <module> File "C:\Python25\lib\os.py", line 435, in getitem return self.data[key.upper()] KeyError: 'PYTHONPATH' >>> print os.environ.get('PYTHONPATH') No...
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Get value of a string after last slash in JavaScript

...urn value (if (n !== -1)), but in the above since we're adding 1 to it and calling substring, we'd end up doing str.substring(0) which just returns the string. Using Array#split Sudhir and Tom Walters have this covered here and here, but just for completeness: var parts = "foo/bar/test.html".spli...
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Dialog with transparent background in Android

... If you're inside a DialogFragment, just call getDialog().getWindow() ... (after the view was created, e.g. in your onViewCreated callback). – akohout Feb 9 '15 at 13:10 ...
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Java: How to set Precision for double value? [duplicate]

... will there be lossy conversion when we call doubleValue()? – swapyonubuntu Nov 21 '16 at 5:24 2 ...
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How to decide between MonoTouch and Objective-C? [closed]

...D-the-kitchen-sink frameworks? MonoTouch. Web services? MonoTouch. Syntactically, they both have their advantages. Objective-C tends to be more verbose where you have to write it. You'll find yourself writing code with C# you wouldn't have to write with ObjC, but it goes both ways. This particular t...
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Percentage Height HTML 5/CSS

...centage height in CSS, but it just remains the same size as the content inside it. When I remove the HTML 5 <!DOCTYTPE html> however, it works, the <div> taking up the whole page as desired. I want the page to validate, so what should I do? ...