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Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
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sqrtss gives a correctly rounded result. rsqrtss gives an approximation to the reciprocal, ac...
Rails I18n validation deprecation warning
I just updated to rails 4.0.2 and I'm getting this warning:
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Can someone explain the traverse function in Haskell?
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traverse is the same as fmap, except that it also allows you to run effects while you're rebuil...
The forked VM terminated without saying properly goodbye. VM crash or System.exit called
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Fastest way to flatten / un-flatten nested JSON objects
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+500
Here's...
How to create enum like type in TypeScript?
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MrZebra
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answered Oct 2 '12 at 9:45
Steve LuccoSteve Lucc...
How to tag an older commit in Git?
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Example:
git tag -a v1.2 9fceb02 -m "Message here"
Where 9fceb02 is the beginning part of the commit id.
You can then push the tag using git push origin v1.2.
You can do git log to show all the commit id's in your current branch.
There is also...
Turning multi-line string into single comma-separated
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You can use awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output re...
JavaScript seconds to time string with format hh:mm:ss
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OS X Bash, 'watch' command
...functionality with the shell loop:
while :; do clear; your_command; sleep 2; done
That will loop forever, clear the screen, run your command, and wait two seconds - the basic watch your_command implementation.
You can take this a step further and create a watch.sh script that can accept your_com...