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Django auto_now and auto_now_add

...Any field with the auto_now attribute set will also inherit editable=False and therefore will not show up in the admin panel. There has been talk in the past about making the auto_now and auto_now_add arguments go away, and although they still exist, I feel you're better off just using a custom save...
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Converting datetime.date to UTC timestamp in Python

I am dealing with dates in Python and I need to convert them to UTC timestamps to be used inside Javascript. The following code does not work: ...
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Difference between volatile and synchronized in Java

... am wondering at the difference between declaring a variable as volatile and always accessing the variable in a synchronized(this) block in Java? ...
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What is the difference between Numpy's array() and asarray() functions?

What is the difference between Numpy's array() and asarray() functions? When should you use one rather than the other? They seem to generate identical output for all the inputs I can think of. ...
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What does “coalgebra” mean in the context of programming?

I have heard the term "coalgebras" several times in functional programming and PLT circles, especially when the discussion is about objects, comonads, lenses, and such. Googling this term gives pages that give mathematical description of these structures which is pretty much incomprehensible to me. ...
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Recursion in Angular directives

...nk] A post-link function, or an object with function(s) registered via pre and post properties. * @returns An object containing the linking functions. */ compile: function(element, link){ // Normalize the link parameter if(angular.isFunction(link)){ ...
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Designing function f(f(n)) == -n

... Hmm, saving state with even and odd numbers, I should've thought of that. – Unknown Apr 8 '09 at 22:25 38 ...
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Saving and loading objects and using pickle

I´m trying to save and load objects using pickle module. First I declare my objects: 7 Answers ...
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What's the difference between emulation and simulation? [duplicate]

In simple understandable terms, what is the difference between the two terms? 10 Answers ...
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Does a javascript if statement with multiple conditions test all of them?

...IT: Though, you shouldn't worry about performance until you've benchmarked and determined that it's a problem. Premature micro-optimization is the bane of maintainability. share | improve this answe...