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What is a deadlock?
...ocess X and process Y
X starts to use A.
X and Y try to start using B
Y 'wins' and gets B first
now Y needs to use A
A is locked by X, which is waiting for Y
The best way to avoid deadlocks is to avoid having processes cross over in this way. Reduce the need to lock anything as much as you can.
...
How can I declare and use Boolean variables in a shell script?
...on when Bash parses the token true. It's just a string, and a completely arbitrary one at that.
Update (2014-02-19): After following the link in miku's answer, now I see where some of the confusion is coming from. Miku's answer uses single brackets, but the code snippet he links to does not use bra...
See :hover state in Chrome Developer Tools
...IT: This answer was before the bug fix, see tnothcutt's answer.This was a bit tricky, but here goes:
Right-click element, but DON'T move your mouse pointer away from the element, keep it in hover state.
Choose inspect element via keyboard, as in hit up arrow and then Enter key.
Look in developer...
How can we run a test method with multiple parameters in MSTest?
...… I've added the information to this SO question because I spent quite a bit of time looking for it. Hopefully this will save somebody some time.
– McAden
Dec 4 '12 at 22:52
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How to set specific java version to Maven
...in which case you already have mvn2 and mvn3 defined and the naming gets a bit funky when Java versions also come into play... :D
– Tomislav Nakic-Alfirevic
Jan 17 '19 at 16:19
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The conversion of a datetime2 data type to a datetime data type resulted in an out-of-range value
... in my App :/ is it possible to add the story.modifiedDate = DateTime.Now; bit to my current code? Thanks
– Cameron
Jan 5 '11 at 21:55
1
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What does FETCH_HEAD in Git mean?
...ch is merged into the commit at the tip of your current branch.
This is a bit like doing git fetch without arguments (or git remote update), updating all your remote branches, then running git merge origin/<branch>, but using FETCH_HEAD internally instead to refer to whatever single ref was f...
Unique BooleanField value in Django?
...
The following solution is a little bit ugly but might work:
class MyModel(models.Model):
is_the_chosen_one = models.NullBooleanField(default=None, unique=True)
def save(self, *args, **kwargs):
if self.is_the_chosen_one is False:
s...
Convert a python UTC datetime to a local datetime using only python standard library?
... here
## You could use `tzlocal` module to get local timezone on Unix and Win32
# from tzlocal import get_localzone # $ pip install tzlocal
# # get local timezone
# local_tz = get_localzone()
def utc_to_local(utc_dt):
local_dt = utc_dt.replace(tzinfo=pytz.utc).astimezone(local_tz)
ret...
Cropping an UIImage
... You're right, Michael, but I think the above solution is a tiny bit faster on non-retina devices as it only does a single check instead of four multiplications plus an assignment. On retina-devices it's just a single boolean check more than necessary, so it's a question of personal prefer...