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Wait for a process to finish
...ect if the process is running to replace the kill -0 $pid call. On Linux, test -d "/proc/$pid" works, on other systems you might have to use pgrep (if available) or something like ps | grep "^$pid ".
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Mixin vs inheritance
...y found a mix-in necessary to use over single inheritance where we are unittesting a lot of similar code, but the test-cases are instantiated based on their inheritance of a base case, and the only way to keep the code close at hand (and in the same module), without messing with coverage numbers, is...
How to make a cross-module variable?
...:
import a
print a.var
import c
print a.var
c.py:
import a
a.var = 2
Test:
$ python b.py
# -> 1 2
Real-world example: Django's global_settings.py (though in Django apps settings are used by importing the object django.conf.settings).
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How to retrieve an element from a set without removing it?
...formance might be important). As already shown by the other answers the fastest way is ForLoop.
However as long as one of the constant time approaches is used the performance difference will be negligible.
iteration_utilities (Disclaimer: I'm the author) contains a convenience function for this ...
Read a file line by line assigning the value to a variable
...ed answer didn't, I suspect that your shell was sh, not bash; the extended test command used in the || [[ -n "$line" ]] syntax in the accepted answer is a bashism. That said, that syntax actually has pertinent meaning: It causes the loop to continue for the last line in the input file even if it doe...
Make sure only a single instance of a program is running
...code should do the job, it is cross-platform and runs on Python 2.4-3.2. I tested it on Windows, OS X and Linux.
from tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is available singleton.py. Please file bugs here.
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How to sort by two fields in Java?
...es it a bit more clunky to define compared to LINQ.
Here is the full unit test for reference:
@Test
public void testChainedSorting()
{
// Create the collection of people:
ArrayList<Person> people = new ArrayList<>();
people.add(new Person("Dan", 4));
people.add(new Pers...
The current SynchronizationContext may not be used as a TaskScheduler
...de a SynchronizationContext. This is how I handle it:
[SetUp]
public void TestSetUp()
{
SynchronizationContext.SetSynchronizationContext(new SynchronizationContext());
}
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How to Detect if I'm Compiling Code with a particular Visual Studio version?
...can either #ifdef on it, or you can use the actual define and do a runtime test. (If for some reason you wanted to run different code based on what compiler it was compiled with? Yeah, probably you were looking for the #ifdef. :))
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Error type 3 Error: Activity class {} does not exist
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May be helpful for someone:--
Sometimes when testing on a device, the app doesn't uninstall properly. To verify and fix this:
Go to Settings.
Go to Apps.
Select your app. (here, you can verify that your app is not uninstalled properly).
Open the overflow menu on the t...