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Understanding generators in Python
...e'
... yield 'one'
... yield 'at'
... yield 'a'
... yield 'time'
>>> myGeneratorInstance = myGenerator()
>>> next(myGeneratorInstance)
These
>>> next(myGeneratorInstance)
words
and so on. The (or one) benefit of generators is that because they deal with...
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...
How do I run all Python unit tests in a directory?
...
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
...
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...
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...
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...
Django REST Framework: adding additional field to ModelSerializer
...ializer.py
class FooSerializer(serializers.ModelSerializer):
retrieved_time = serializers.SerializerMethodField()
@classmethod
def get_retrieved_time(self, object):
"""getter method to add field retrieved_time"""
return None
class Meta:
model = Foo
...
What do linkers do?
...mpiler converts the source file into object byte code. This byte code (sometimes called object code) is mnemonic instructions that only your computer architecture understands. Traditionally, these files have an .OBJ extension.
After the object file is created, the linker comes into play. More ofte...
jQueryUI Tooltips are competing with Twitter Bootstrap
... I would "clear cache and hard refresh" the page and the tooltip would sometimes work and then sometimes not (no error in console.log). Refreshing 30 times produced working results 7 times. I then went and downloaded a customized jQuery UI package and now when I "clear cache and hard refresh" 30 tim...
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
...