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Single Line Nested For Loops
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The best source of information is the official Python tutorial on list comprehensions. List comprehensions are nearly the same as for loops (certainly any list comprehension can be written as a for-loop) but they are often faster than using a for loop.
Look at this longer list comprehension fr...
Check status of one port on remote host [closed]
I need a command line that can check the port status on a remote host. I tried ping xxx.xxx.xxx.xxx:161 but it doesn't recognize the "host". I thought it was a "good" answer until I did the same command against a host I know has that port open. This is for a batch file on Windows that will chec...
A more useful statusline in vim? [closed]
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Nothing special done, from: github.com/Lokaltog/vim-powerline#troubleshooting just make sure you have "let g:Powerline_symbols = 'fancy'" in your vimrc file and have patched fonts installed.
– Gavin Gilmour
Sep 16 '12 at ...
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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OS X Bash, 'watch' command
I'm looking for the best way to duplicate the Linux 'watch' command on Mac OS X. I'd like to run a command every few seconds to pattern match on the contents of an output file using 'tail' and 'sed'.
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Breakpoint on property change
... elements this pattern should be slightly modified. See mnaoumov.wordpress.com/2015/11/29/… for more details
– mnaoumov
Nov 29 '15 at 0:04
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What does “#define _GNU_SOURCE” imply?
...OSIX-specified functions, where the GNU folks disagreed with the standards committee on how the functions should behave and decided to do their own thing.
As long as you're aware of these things, it should not be a problem to define _GNU_SOURCE, but you should avoid defining it and instead define ...
Python constructors and __init__
... Wikipedia is a good starting point. For Python-specific stuff, I highly recommend the Python docs.
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There is already an open DataReader associated with this Command which must be closed first
... not clear from your example where this happens because the example is not complete.
One thing that can cause this is lazy loading triggered when iterating over the results of some query.
This can be easily solved by allowing MARS in your connection string. Add MultipleActiveResultSets=true to the...
When I catch an exception, how do I get the type, file, and line number?
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