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Greenlet Vs. Threads

... to gevents and greenlets. I found some good documentation on how to work with them, but none gave me justification on how and when I should use greenlets! ...
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MVVM in WPF - How to alert ViewModel of changes in Model… or should I?

... a reference to your Model property to attach the PropertyChanged event to it, then you can use a Messaging system such as Prism's EventAggregator or MVVM Light's Messenger. I have a brief overview of messaging systems on my blog, however to summarize it, any object can broadcast a message, and any...
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Circular (or cyclic) imports in Python

...e was a really good discussion on this over at comp.lang.python last year. It answers your question pretty thoroughly. Imports are pretty straightforward really. Just remember the following: 'import' and 'from xxx import yyy' are executable statements. They execute when the running progra...
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How do you 'redo' changes after 'undo' with Emacs?

... Short version: by undoing the undo. If you undo, and then do a non-editing command such as C-f, then the next undo will undo the undo, resulting in a redo. Longer version: You can think of undo as operating on a stack of operations. If you perform some command (even a navigation command such...
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Comparing two NumPy arrays for equality, element-wise

What is the simplest way to compare two NumPy arrays for equality (where equality is defined as: A = B iff for all indices i: A[i] == B[i] )? ...
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Can Flask have optional URL parameters?

Is it possible to directly declare a flask URL optional parameter? 11 Answers 11 ...
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How do I check if a number evaluates to infinity?

I have a series of Javascript calculations that (only under IE) show Infinity depending on user choices. 7 Answers ...
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Override setter with arc

...follow | edited Jan 6 '12 at 8:00 Evan 5,59111 gold badge2121 silver badges4343 bronze badges ...
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UICollectionView Set number of columns

...mber of columns in a collectionview. The default is set to 3 (iPhone/portrait). I've looked at the documentation and can't seem to find a concise answer. ...
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What is the minimum I have to do to create an RPM file?

I just want to create an RPM file to distribute my Linux binary "foobar", with only a couple of dependencies. It has a config file, /etc/foobar.conf and should be installed in /usr/bin/foobar. ...