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With bash, how can I pipe standard error into another process?
...t, you can do it this way:
proc1 2>&1 1>/dev/null | proc2
The order is vital; you would not want:
proc1 >/dev/null 2>&1 | proc1
As this will redirect everything to /dev/null!
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The Concept of 'Hold space' and 'Pattern space' in sed
...en read and the hold space (containing all the previous lines in a reverse order) have been appended to the pattern space, pattern space is printed with p. As you have guessed, the above does exactly what the tac command does -- prints the file in reverse.
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Differences between std::make_unique and std::unique_ptr with new
...t_can_throw()); - to quote the answer: The compiler is allowed to call (in order): new T, function_that_can_throw(), unique_ptr<T>(...). Obviously if function_that_can_throw actually throws then you leak. make_unique prevents this case. So, my question is answered.
– Da...
The character encoding of the HTML document was not declared
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Python's many ways of string formatting — are the older ones (going to be) deprecated?
...rase was removed later, in commit Close #4966: revamp the sequence docs in order to better explain the state of modern Python. This might seem like a sign that a plan to deprecate % formatting was back on the cards... but diving into the bug tracker reveals that the intent was the opposite. On the b...
Behaviour for significant change location API when terminated/suspended?
... believe you need to reregister on each launch with significant changes in order to be launched again though.
– Aaron
Aug 10 '10 at 5:37
1
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How to duplicate sys.stdout to a log file?
...ess, os, sys
# Unbuffer output (this ensures the output is in the correct order)
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)
tee = subprocess.Popen(["tee", "log.txt"], stdin=subprocess.PIPE)
os.dup2(tee.stdin.fileno(), sys.stdout.fileno())
os.dup2(tee.stdin.fileno(), sys.stderr.fileno())
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Running unittest with typical test directory structure
...may need
to add your module’s parent directory
to your PYTHONPATH in order to run
them:
$ cd /path/to/googlemaps
$ export PYTHONPATH=$PYTHONPATH:/path/to/googlemaps/googlemaps
$ python test/test_googlemaps.py
Finally, there is one more popular
unit testing framework for Python
(...
RESTfully design /login or /register resources?
...ble). You can have a lookup though for external/internal id conversion in order to mitigate backend requirements.
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How are 3D games so efficient? [closed]
... a completely full-featured hardware device which is unlikely to exist, in order to show off all the features of the API. But since the hardware doesn't actually exist, it runs on your CPU instead. That's much more inefficient than delegating to a graphics card -- hence your high CPU usage.
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