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NSNotificationCenter addObserver in Swift
...er to un-register itself when being
deallocated. more info
For a block based implementation you need to do a weak-strong dance if you want to use self inside the block. more info
Block based observers need to be removed more info
let center = NSNotificationCenter.defaultCenter()
center.removeO...
Filter by property
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Nope. Django filters operate at the database level, generating SQL. To filter based on Python properties, you have to load the object into Python to evaluate the property--and at that point, you've already done all the work to load it.
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Checking out Git tag leads to “detached HEAD state”
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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Batch files - number of command line arguments
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how can you alter the flow based on this? (may be a different question, but I think a short example would be also very convenient here!)
– n611x007
Aug 23 '13 at 18:53
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How can I open multiple files using “with open” in Python?
... sounds like something coming from your editor or environment, rather than base python. If it continues to be a problem for you, I'd recommend creating a new question relating to it and giving more detail on your editor and environment.
– Michael Ohlrogge
Jul ...
Debugging Package Manager Console Update-Database Seed Method
I wanted to debug the Seed() method in my Entity Framework database configuration class when I run Update-Database from the Package Manager Console but didn't know how to do it. I wanted to share the solution with others in case they have the same issue.
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Get class name of django model
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Try Book.__name__.
Django models are derived from the ModelBase, which is the Metaclass for all models.
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How does the main() method work in C?
...ents.
The leftmost arguments are closer to the top of the stack, or to the base of the stack frame, so that spurious arguments do not invalidate the addressing.
One set of calling conventions which obeys these rules is stack-based parameter passing whereby the caller pops the arguments, and they a...
How to apply a function to two columns of Pandas dataframe
...r than (unsafe) numeric indices to access the columns.
Example with data (based on original question):
import pandas as pd
df = pd.DataFrame({'ID':['1', '2', '3'], 'col_1': [0, 2, 3], 'col_2':[1, 4, 5]})
mylist = ['a', 'b', 'c', 'd', 'e', 'f']
def get_sublist(sta,end):
return mylist[sta:end+...
Ruby send vs __send__
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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