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Why do I need to explicitly push a new branch?

... I saw that when I did git push my branch was not uploaded to the repository. I had to actually do: git push -u origin --all . Why is this? Isn't a branch a new change to be pushed by default? Why do I need to run the second command? ...
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What does the Subversion status symbol “~” mean?

...he SVN Book says: Item is versioned as one kind of object (file, directory, link), but has been replaced by different kind of object. So perhaps it was originally a single file, but you changed it to a directory, or something along those lines? ...
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Set attributes from dictionary in python

...s: class Employee(object): def __init__(self, initial_data): for key in initial_data: setattr(self, key, initial_data[key]) Update As Brent Nash suggests, you can make this more flexible by allowing keyword arguments as well: class Employee(object): def __init__(self...
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Celery Received unregistered task of type (run example)

....TaskRegistry class. Could be that your celeryconfig (in the current directory) is not in PYTHONPATH so celery can't find it and falls back to defaults. Simply specify it explicitly when starting celery. celeryd --loglevel=INFO --settings=celeryconfig You can also set --loglevel=DEBUG and you sho...
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The most efficient way to implement an integer based power function pow(int, int)

...ation by squaring. int ipow(int base, int exp) { int result = 1; for (;;) { if (exp & 1) result *= base; exp >>= 1; if (!exp) break; base *= base; } return result; } This is the standard method for doing modula...
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GetHashCode Guidelines in C#

... guideline, but perhaps not a valid rule. It also doesn't tell the whole story. The point being made is that for mutable types, you cannot base the hash code on the mutable data because two equal objects must return the same hash code and the hash code has to be valid for the lifetime of the object...
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Observer Design Pattern vs “Listeners”

...ers found in various toolkits. Is there a difference between the concepts, or are Listeners and Observers really the same thing. ...
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When to throw an exception?

I have exceptions created for every condition that my application does not expect. UserNameNotValidException , PasswordNotCorrectException etc. ...
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best way to preserve numpy arrays on disk

I am looking for a fast way to preserve large numpy arrays. I want to save them to the disk in a binary format, then read them back into memory relatively fastly. cPickle is not fast enough, unfortunately. ...
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Get distance between two points in canvas

...ab and want lineWidth to be based on distance between two last mousemove coordinate updates. I will make translation of distance to width myself, I just need to know how to get distance between those points (I already have coordinates of those pointes). ...