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How to show the loading indicator in the top status bar
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Slide right to left?
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Your code need more CSS to look like a real slide left
– AmerllicA
Sep 23 '17 at 7:03
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How to reset a single table in rails?
...callbacks, and takes a little longer.
delete_all is a straight SQL query.
More info here: http://apidock.com/rails/ActiveRecord/Base/delete_all/class
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Printing the last column of a line in a file
...n there are enough lines or end of file is reached. tail -f means wait for more input, but there are no more lines in file and so the pipe to grep is never closed.
If you omit -f from tail the output is shown immediately:
tail file | grep A1 | awk '{print $NF}'
@EdMorton is right of course. Aw...
send mail from linux terminal in one line [closed]
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echo "My message" | mail -s subject user@gmail.com
See the manual for more information.
As far as configuring postfix goes, there's plenty of articles on the internet on how to do it.
Unless you're on a public server with a registered domain, you generally want to forward the email to a SMTP s...
How to use the CancellationToken property?
...oCompletion. And that can affect not just explicit state checks, but also, more subtly, task chaining with e.g. ContinueWith, depending on the TaskContinuationOptions used. I'd say that avoiding ThrowIfCancellationRequested is dangerous advice.
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Calling a Method From a String With the Method's Name in Ruby
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How is a CRC32 checksum calculated?
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How to reverse a 'rails generate'
...d and roll back any changes made, but not necessarily to the database, but more to the config files.
17 Answers
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Optimise PostgreSQL for fast testing
...couple of connections that do lots of work, increase work_mem to give them more RAM to play with for sorts etc. Beware that too high a work_mem setting can cause out-of-memory problems because it's per-sort not per-connection so one query can have many nested sorts. You only really have to increase ...