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Database sharding vs partitioning
...tition instead of 104 partitions. This query could potentially execute 100 times faster simply because of partition pruning.
Partitioning Strategies
Range
Hash
List
You can read their text and visualize their images which explain everything pretty well.
And lastly, it is important to understan...
List comprehension: Returning two (or more) items for each item
...rable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
setup='gc.enable(); from it...
Can I get a list of files marked --assume-unchanged?
... 'assume-unchanged'.
git ls-files -v|grep "^h"
I've used this lots of times in different environments and it works perfectly.
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How do I run all Python unit tests in a directory?
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Not always doable: sometimes importing structure of the project can lead to nose getting confused if it tries to run the imports on modules.
– chiffa
Nov 20 '15 at 13:47
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Benefit of using Parcelable instead of serializing object
...as made). I've been using java serialization without any issues for a long time now. You can find some potentially interesting things on this topic in a blog post I've just written. nemanjakovacevic.net/blog/english/2015/03/24/…
– Nemanja Kovacevic
Mar 25 '15...
How do I return NotFound() IHttpActionResult with an error message or exception?
...end against the inheritance tip. My team decided to do exactly that a long time ago, and it bloated the classes a lot by doing it. I just recently refactored all of it into extension methods and moved away from the inheritance chain. I'd seriously recommend people to carefully consider when they sho...
Debug code-first Entity Framework migration codes
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@Talon Go grab a coffee and by the time you're back probably another Visual Studio instance popped up. :)
– Corstian Boerman
Jun 17 '14 at 8:40
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git checkout tag, git pull fails in branch
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First, make sure you are on the right branch.
Then (one time only):
git branch --track
After that this works again:
git pull
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Android – Listen For Incoming SMS Messages
...mplete message. Your Receiver will only ever get one complete message at a time; it just might be in multiple parts.
– Mike M.
Jan 16 '17 at 22:23
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Changing MongoDB data store directory
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Resolved it in 2 minutes downtime :)
Just move your folder, add symlink, then tune permissions.
sudo service mongod stop
sudo mv mongodb /new/disk/mongodb/
sudo ln -s /new/disk/mongodb/ /var/lib/mongodb
sudo chown mongodb:mongodb /new/disk/mongodb/
sudo ...