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Why is there no tuple comprehension in Python?
...ference between using a comprehension and using a constructor+generator is more than subtle if you care about performance. Comprehensions result in faster construction compared to using a generator passed to a constructor. In the latter case you are creating and executing functions and functions are...
Why is IoC / DI not common in Python?
...autiful, brilliant scripting language at your disposal? Actually, that's a more general question: when you program in pretty much any language, why would you want to use an ugly, bad scripting language when you have Jython and IronPython at your disposal?
So, to recap: the practice of DI/IoC is just...
“Large data” work flows using pandas
...te new columns, save these.
(Giving a toy example could enable us to offer more specific recommendations.)
After that processing, then what do you do? Is step 2 ad hoc, or repeatable?
Input flat files: how many, rough total size in Gb. How are these organized e.g. by records? Does each one contains ...
Split (explode) pandas dataframe string entry to separate rows
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Can the solution be extended to more than two columns?
– horatio1701d
Jun 25 '14 at 21:54
1
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Why do we use __init__ in Python classes?
...ributes" that are colour or legs above.
Now, to something less canine and more programming-related. As I write below, class to add things is not sensible - what is it a class of? Classes in Python make up of collections of different data, that behave similarly. Class of dogs consists of Fido and Sp...
Gradients on UIView and UILabels On iPhone [duplicate]
...ankly, for each bitmap in your application, you're setting yourself up for more work in the future. Gradient code will always look great. Your bitmap will only look good until Apple decides to increase the resolution of the screen again.
– ArtOfWarfare
Dec 30 '...
How can I get the diff between all the commits that occurred between two dates with Git?
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Dynamically generating a QR code with PHP [closed]
...QR code, and
the choe is the (optional) encoding.
The link, above, gives more detail, but to use it just have the src of an image point to the manipulated value, like so:
<img src="https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=http%3A%2F%2Fwww.google.com%2F&choe=UTF-8" ...
WebSockets vs. Server-Sent events/EventSource
...one with SSE can also be done with Websockets, Websockets is getting a lot more attention and love, and many more browsers support Websockets than SSE.
However, it can be overkill for some types of application, and the backend could be easier to implement with a protocol such as SSE.
Furthermore ...
Why is f(i = -1, i = -1) undefined behavior?
...r operation on the same memory location.
For example, imagine that it was more efficient to zero the memory, then decrement it, compared with loading the value -1 in. Then this:
f(i=-1, i=-1)
might become:
clear i
clear i
decr i
decr i
Now i is -2.
It is probably a bogus example, but it is p...