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“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...005, but there's no progress or plan as far as I know. bugs.mysql.com/bug.php?id=9018
– Bill Karwin
Jul 16 '12 at 2:23
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Subprocess changing directory
...es the working directory immediately before executing a subprocess.
For example, to execute ls in the root directory, you either can do
wd = os.getcwd()
os.chdir("/")
subprocess.Popen("ls")
os.chdir(wd)
or simply
subprocess.Popen("ls", cwd="/")
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How to use SSH to run a local shell script on a remote machine?
...ipt that requires sudo, run ssh root@MachineB 'echo "rootpass" | sudo -Sv && bash -s' < local_script.sh.
– bradley.ayers
Sep 20 '12 at 23:32
6
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What is the fastest factorial function in JavaScript? [closed]
Looking for a really fast implementation of factorial function in JavaScript. Any suggests?
49 Answers
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Run certain code every n seconds [duplicate]
Is there a way to, for example, print Hello World! every n seconds?
For example, the program would go through whatever code I had, then once it had been 5 seconds (with time.sleep() ) it would execute that code. I would be using this to update a file though, not print Hello World.
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How do I ignore files in Subversion?
...n as "unversioned": your SVN client will pretend the file doesn't exist at all in the filesystem.
Ignored files are specified by a "file pattern". The syntax and format of file patterns is explained in SVN's online documentation: http://svnbook.red-bean.com/nightly/en/svn.advanced.props.special.ign...
What is the point of noreturn?
...n attribute is supposed to be used for functions that don't return to the caller. That doesn't mean void functions (which do return to the caller - they just don't return a value), but functions where the control flow will not return to the calling function after the function finishes (e.g. function...
Character reading from file in Python
... print repr(line)
It's also possible to open files in update mode, allowing both reading and writing:
with codecs.open('test', encoding='utf-8', mode='w+') as f:
f.write(u'\u4500 blah blah blah\n')
f.seek(0)
print repr(f.readline()[:1])
EDIT: I'm assuming that your intended go...
How do I list the symbols in a .so file
...ing the '-C' option for demangling symbols. c++filt can be used instead. Example script here: v8.googlecode.com/svn/branches/bleeding_edge/tools/mac-nm nm -g /usr/lib/libstdc++.6.dylib | c++filt -p -i
– fredbaba
Jun 12 '13 at 21:13
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What is a smart pointer and when should I use one?
... If you declare a pointer to a smart pointer (as was done in the example) you knowingly give up all benefits of the smart pointer. This is not a drawback or a design flaw, it is the most idiotic usage imaginable.
– Michael Dorst
Aug 13 '14 at 22:02
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