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Match two strings in one line with grep
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@AlexanderN indeed I cant make it work with multiline, thats so weird it was accepted..
– Aquarius Power
Oct 24 '13 at 3:23
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Bash Script : what does #!/bin/bash mean? [duplicate]
...ipt with, when executed.
In your example, the script is to be interpreted and run by the bash shell.
Some other example shebangs are:
(From Wikipedia)
#!/bin/sh — Execute the file using sh, the Bourne shell, or a compatible shell
#!/bin/csh — Execute the file using csh, the C shell, or a com...
Redis is single-threaded, then how does it do concurrent I/O?
...pends on how you define concurrency.
In server-side software, concurrency and parallelism are often considered as different concepts. In a server, supporting concurrent I/Os means the server is able to serve several clients by executing several flows corresponding to those clients with only one com...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
.... Then we iterate through for i up to n, doing two things: pressing A once and pressing select all + copy followed by paste j times (actually j-i-1 below; note the trick here: the contents are still in the clipboard, so we can paste it multiple times without copying each time). We only have to consi...
MySQL OPTIMIZE all tables?
MySQL has an OPTIMIZE TABLE command which can be used to reclaim unused space in a MySQL install. Is there a way (built-in command or common stored procedure) to run this optimization for every table in the database and/or server install, or is this something you'd have to script up yourself?
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Static link of shared library function in gcc
...is actually an executable in a special format
with entry points specified (and some sticky addressing issues
included). It does not have all the information needed to
link statically.
You can't statically link a shared library (or dynamically link a static one).
The flag -static will force the linke...
“NODE_ENV” is not recognized as an internal or external command, operable command or batch file
...s would be
SET NODE_ENV=development
node foo.js
running in the same command shell. You mentioned set NODE_ENV did not work, but wasn't clear how/when you executed it.
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How to open, read, and write from serial port in C?
I am a little bit confused about reading and writing to a serial port. I have a USB device in Linux that uses the FTDI USB serial device converter driver. When I plug it in, it creates: /dev/ttyUSB1.
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psql: FATAL: Ident authentication failed for user “postgres”
I have installed PostgreSQL and pgAdminIII on my Ubuntu Karmic box.
23 Answers
23
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Python multiprocessing PicklingError: Can't pickle
I am sorry that I can't reproduce the error with a simpler example, and my code is too complicated to post. If I run the program in IPython shell instead of the regular Python, things work out well.
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