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Ruby, !! operator (a/k/a the double-bang) [duplicate]
... of the boolean value of the operand. So when you chain two exclamation marks together, it converts the value to a boolean.
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For each row in an R dataframe
...frame, and for each row in that dataframe I have to do some complicated lookups and append some data to a file.
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LaTeX source code listing like in professional books
How should a latex source code listing look like to produce an output like in known books, for example one for the Spring Framework? I've tried with the latex listings package but wasn't able to produce something that looked as nice as the one below. So I'm primarely interested in the formatting ins...
Any way to properly pretty-print ordered dictionaries?
I like the pprint module in Python. I use it a lot for testing and debugging. I frequently use the width option to make sure the output fits nicely within my terminal window.
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Java ByteBuffer to String
...d should be the accepted answer.
Your approach would be reasonable if you knew the bytes are in the platform's default charset. In your example, this is true because k.getBytes() returns the bytes in the platform's default charset.
More frequently, you'll want to specify the encoding. However, the...
How can I open a cmd window in a specific location?
...dow Here" context menu option on
file system folders, giving you a
quick way to open a command window
(cmd.exe) pointing at the selected
folder.
EDIT : This software will not work on any version of Windows apart from Windows XP.
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How to prevent auto-closing of console after the execution of batch file
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In Windows/DOS batch files:
pause
This prints a nice "Press any key to continue . . . " message
Or, if you don't want the "Press any key to continue . . ." message, do this instead:
pause >nul
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python: how to send mail with TO, CC and BCC?
...ot only TO specific mailboxes, but CC and BCC them as well. It does not look like smtplib supports CC-ing and BCC-ing while sending emails.
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Principal component analysis in Python
I'd like to use principal component analysis (PCA) for dimensionality reduction. Does numpy or scipy already have it, or do I have to roll my own using numpy.linalg.eigh ?
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How do I address unchecked cast warnings?
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The obvious answer, of course, is not to do the unchecked cast.
If it's absolutely necessary, then at least try to limit the scope of the @SuppressWarnings annotation. According to its Javadocs, it can go on local variables; this way, it doesn't even affect the entire method.
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