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What command means “do nothing” in a conditional in Bash?
... ]
then
:
elif [ "$a" -le 5 ]
then
echo "1"
else
echo "2"
fi
From the bash manual:
: (a colon)
Do nothing beyond expanding arguments and performing redirections. The return status is zero.
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Vim - how to run a command immediately when starting vim?
... *SHELL* *COMSPEC* *TERM*
2. Process the arguments
3. Execute Ex commands, from environment variables and/or files *vimrc* *exrc*
4. Load the plugin scripts. *load-plugins*
5. Set 'shellpipe' and 'shellredir'
6. Set 'updatecount' to zero, if "-n" command argument used...
Text blinking jQuery
...e blink tag into the 21st century, all of my 90s parody websites thank you from the bottom of their ugly little hearts :)
– Casey Rodarmor
Mar 16 '12 at 10:21
1
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Does Python support short-circuiting?
...72]: name
Out[172]: '<Unkown>'
In other words, if the return value from raw_input is true (not an empty string), it is assigned to name (nothing changes); otherwise, the default '<unknown>' is assigned to name.
...
HashSet vs. List performance
...on my machine, and, well, it has to be very very small to get an advantage from List<T>. For a list of short strings, the advantage went away after size 5, for objects after size 20.
1 item LIST strs time: 617ms
1 item HASHSET strs time: 1332ms
2 item LIST strs time: 781ms
2 item HASHSET str...
Using comparison operators in Scala's pattern matching system
...ke such an assumption without some risk of the implementation changing out from underneath.
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Calling pylab.savefig without display in ipython
...t working in the ipython notebook, plt.ioff() is important to stop figures from flickering on and off the screen, as in command-line ipython figures are plotted as soon as you call plt.plot() if interactive mode is on. Turning interactive mode off delays the display of any plots until plt.show(). ...
Does Go provide REPL?
...ge name), and could be run like gotry 1+2 and gotry fmt 'Println("hello")' from shell. It is no longer available because not many people actually used it.
I have also seen third party projects for building a REPL for Go, but now I can only find links to two of them: igo and go-repl. How well do the...
Maven – Always download sources and javadocs
...
Answer for people from Google
In Eclipse you can automatically download javadoc and sources.
To do that, right click on the project and use
Maven -> Download JavaDoc
Maven -> Download Sources
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What is this: [Ljava.lang.Object;?
I get this when I call toString on an object I received from a function call. I know the type of the object is encoded in this string, but I don't know how to read it.
...