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Remove blank lines with grep
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Try the following:
grep -v -e '^$' foo.txt
The -e option allows regex patterns for matching.
The single quotes around ^$ makes it work for Cshell. Other shells will be happy with either single or double quotes.
UPDATE: This works for me for a file with blank lines or "all white ...
Visual Studio 2013 doesn't discover unit tests
...io. To run the tests I try to go to the menu and choose Test -> Run -> Run all tests or by opening the test explorer window. By those to methods visual studio doesn’t discover any tests in the solution.
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What's the best CRLF (carriage return, line feed) handling strategy with Git?
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Almost four years after asking this question, I have finally
found an answer that completely satisfies me!
See the details in github:help's guide to
Dealing with line endings.
Git allows you to set the line ending properties for a
repo directly using the text attribute in t...
Chmod recursively
...have an archive, which is archived by someone else, and I want to automatically, after I download it, to change a branch of the file system within the extracted files to gain read access. (I can't change how archive is created).
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How do I rename all folders and files to lowercase on Linux?
..." "${DST}" || echo "${SRC} was not renamed"
fi
done
P.S.
The latter allows more flexibility with the move command (for example, "svn mv").
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How does JPA orphanRemoval=true differ from the ON DELETE CASCADE DML clause
... does not have the same effect. ON DELETE CASCADE tells the DB to delete all child records when the parent is deleted. That is if I delete the INVOICE, then delete all of the ITEMS on that INVOICE. OrphanRemoval tells the ORM that if I remove an Item object from the collection of Items that bel...
Convert a PHP script into a stand-alone windows executable
I want to automate a fairly simple task. For this I have written a small PHP script which I run from the command line using PHP-CLI. Now I want to hand over this script to someone but I do not want to:
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Is there a standard function to check for null, undefined, or blank variables in JavaScript?
...t undefined or null ? I've got this code, but I'm not sure if it covers all cases:
41 Answers
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How can I copy data from one column to another in the same table?
Is it possible to copy data from column A to column B for all records in a table in SQL?
3 Answers
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Which timestamp type should I choose in a PostgreSQL database?
...ative TIMESTAMPs.
From a programmatic and consistency perspective, ensure all calculations are made using UTC as the time zone. This isn’t a PostgreSQL requirement, but it helps when integrating with other programming languages or environments. Setting a CHECK on the column to make sure the writ...