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Catching error codes in a shell pipe
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If you really don't want the second command to proceed until the first is known to be successful, then you probably need to use temporary files. The simple version of that is:
tmp=${TMPDIR:-/tmp}/mine.$$
if ./a > $tmp.1
then
if ./b <$tmp.1 >$tmp.2
then
if ./c <$tmp....
How to properly use unit-testing's assertRaises() with NoneType objects? [duplicate]
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If you are using python2.7 or above you can use the ability of assertRaises to be use as a context manager and do:
with self.assertRaises(TypeError):
self.testListNone[:1]
If you are using python2.6 another way beside the one given until now is to use unittest2 which is a back port of uni...
How do you embed binary data in XML?
...ing end to get the data back out of the messages. One of the requirements is to embed binary data in an XML message, but SAX doesn't like this. Does anyone know how to do this?
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MySQL root access from all hosts
I've installed MySQL server on a remote Ubuntu machine. The root user is defined in the mysql.user table this way:
9 An...
How to prevent vim from creating (and leaving) temporary files?
Why does vim create <filename>~ files? Is there a way to disable that?
7 Answers
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How to extract a floating number from a string [duplicate]
...er. I say floating and not decimal as it's sometimes whole. Can RegEx do this or is there a better way?
7 Answers
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Seeing escape characters when pressing the arrow keys in python shell
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Looks like readline is not enabled. Check if PYTHONSTARTUP variable is defined, for me it points to /etc/pythonstart and that file is executed by the python process before going interactive, which setups readline/history handling.
Thanks to @ch...
Make an HTTP request with android
I have searched everywhere but I couldn't find my answer, is there a way to make an simple HTTP request? I want to request an PHP page / script on one of my website but I don't want to show the webpage.
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The difference between the 'Local System' account and the 'Network Service' account?
I have written a Windows service that spawns a separate process. This process creates a COM object. If the service runs under the 'Local System' account everything works fine, but if the service runs under the 'Network Service' account, the external process starts up but it fails to create the COM o...
Objective-C class -> string like: [NSArray className] -> @“NSArray”
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answered Feb 25 '10 at 6:04
dreamlaxdreamlax
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