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Is using a lot of static methods a bad thing?
..."safe" static method will always give the same output for the same inputs. It modifies no globals and doesn't call any "unsafe" static methods of any class. Essentially, you are using a limited sort of functional programming -- don't be afraid of these, they're fine.
An "unsafe" static method mutate...
Getting the caller function name inside another function in Python? [duplicate]
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You can use the inspect module to get the info you want. Its stack method returns a list of frame records.
For Python 2 each frame record is a list. The third element in each record is the caller name. What you want is this:
>>> import inspect
>>> def f():
... ...
Get records with max value for each group of grouped SQL results
...also the problems of returning multiple rows when there are more than one with the same maximum value (as the other answers would do)
Note: This is a mysql-only solution. All other databases I know will throw an SQL syntax error with the message "non aggregated columns are not listed in the group by...
mongoose vs mongodb (nodejs modules/extensions), which better? and why?
I've just arrived to Node.js and see that there are many libs to use with the MongoDB, the most popular seem to be these two: (mongoose and mongodb). Can I get pros and cons of those extensions? Are there better alternatives to these two?
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Where does Java's String constant pool live, the heap or the stack?
...constants pool and the String constant pool used by JVMs to handle String literals. But I don't know which type of memory is used by the JVM to store String constant literals. The stack or the heap? Since its a literal which is not associated with any instance I would assume that it will be stored i...
How to get the first element of an array?
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@Andy There were no assumptions, as OP's question was quite clear and specific.
– John Hartsock
Aug 11 '15 at 0:36
5
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Should private helper methods be static if they can be static
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I prefer such helper methods to be private static; which will make it clear to the reader that they will not modify the state of the object. My IDE will also show calls to static methods in italics, so I will know the method is static without looking the signature.
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Fast way to get image dimensions (not filesize)
...ooking for a fast way to get the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obviousl...
No == operator found while comparing structs in C++
...ucts do not have a comparison operator generated by default. You need to write your own:
bool operator==(const MyStruct1& lhs, const MyStruct1& rhs)
{
return /* your comparison code goes here */
}
share
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What are Flask Blueprints, exactly?
...emplate for generating a "section" of a web application. You can think of it as a mold:
You can take the blueprint and apply it to your application in several places. Each time you apply it the blueprint will create a new version of its structure in the plaster of your application.
# An example...