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How can I pass a list as a command-line argument with argparse?
...1234 -l 2345 -l 3456 -l 4567
With append you provide the option multiple times to build up the list.
Don't use type=list!!! - There is probably no situation where you would want to use type=list with argparse. Ever.
Let's take a look in more detail at some of the different ways one might try t...
Read logcat programmatically within application
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I just discovered that clearing the log can take some time. So if you clear the log and then read the log immediate, some old entries may not yet been cleared. In addition, some newly added log entries can be deleted as because they get added before the clear completes. It do...
Is optimisation level -O3 dangerous in g++?
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In the early days of gcc (2.8 etc.) and in the times of egcs, and redhat 2.96 -O3 was quite buggy sometimes. But this is over a decade ago, and -O3 is not much different than other levels of optimizations (in buggyness).
It does however tend to reveal cases where people ...
Use space as a delimiter with cut command
...All solutions above result in the exact same string (in each group) by the time cut sees them:
(s): cut sees -d, as its own argument, followed by a separate argument that contains a space char - without quotes or \ prefix!.
(d): cut sees -d plus a space char - without quotes or \ prefix! - as par...
How can I do test setup using the testing package in Go
.... It should then call
os.Exit with the result of m.Run
It took me some time to figure out that this means that if a test contains a function func TestMain(m *testing.M) then this function will be called instead of running the test. And in this function I can define how the tests will run. For ex...
Import PEM into Java Key Store
...r both. Either remove all extraneous data and feed in each PEM in one at a time or use my tool, as detailed in my answer.
– Alastair McCormack
Apr 15 '13 at 14:39
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Get the IP address of the machine
...he approach requires that you choose a specific external host. Most of the time, any well-known public IP should do the trick. I like Google's public DNS server address 8.8.8.8 for this purpose, but there may be times you'd want to choose a different external host IP. Here is some code that illustra...
Default template arguments for function templates
... template arguments for function templates is a misbegotten remnant of the time where freestanding functions were treated as second class citizens and required all template arguments to be deduced from the function arguments rather than specified.
The restriction seriously cramps programming st...
Twitter image encoding challenge [closed]
...ng runs of invalid and valid characters.
Anyway, here are some images and times (as measured on my old 3.0GHz P4), and compressed to 140 characters in the full assigned unicode set described above. Overall, I'm fairly pleased with how they all turned out. If I had more time to work on this, I'd p...
pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message
...of copies of uninitialised memory values, this has been suggested multiple times. Unfortunately, almost all programs legitimately copy uninitialised memory values around (because compilers pad structs to preserve alignment) and eager checking leads to hundreds of false positives. Therefore Memcheck ...