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What is @ModelAttribute in Spring MVC?
What is the purpose and usage of @ModelAttribute in Spring MVC?
13 Answers
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python pandas: apply a function with arguments to a series
...want to pass more parameters you should use functools.partial as suggested by Joel Cornett in his comment.
An example:
>>> import functools
>>> import operator
>>> add_3 = functools.partial(operator.add,3)
>>> add_3(2)
5
>>> add_3(7)
10
You can also p...
Principal component analysis in Python
...might have a look at MDP.
I have not had the chance to test it myself, but I've bookmarked it exactly for the PCA functionality.
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What do linkers do?
... file that can be executed on your machine or someone else's machine running the same machine architecture).
Under the hood, when a program is compiled, the compiler converts the source file into object byte code. This byte code (sometimes called object code) is mnemonic instructions that only you...
Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
I was looking for the fastest way to popcount large arrays of data. I encountered a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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what does the __file__ variable mean/do?
I usually just hard-wire these with the actual path. But there is a reason for these statements that determine path at runtime, and I would really like to understand the os.path module so that I can start using it.
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Performance of Arrays vs. Lists
...need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume processing.
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How Pony (ORM) does its tricks?
...Python generator into SQL query in three steps:
Decompiling of generator bytecode and rebuilding generator AST
(abstract syntax tree)
Translation of Python AST into "abstract SQL" -- universal
list-based representation of a SQL query
Converting abstract SQL representation into specific
database-de...
Design by contract using assertions or exceptions? [closed]
When programming by contract a function or method first checks whether its preconditions are fulfilled, before starting to work on its responsibilities, right? The two most prominent ways to do these checks are by assert and by exception .
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Why does modern Perl avoid UTF-8 by default?
I wonder why most modern solutions built using Perl don't enable UTF-8 by default.
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