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Why is it slower to iterate over a small string than a small list?
...fference is closer to 70% (or more) once a lot of the overhead is removed, for Python 2.
Object creation is not at fault. Neither method creates a new object, as one-character strings are cached.
The difference is unobvious, but is likely created from a greater number of checks on string indexing, w...
snprintf and Visual Studio 2010
I'm unfortunate enough to be stuck using VS 2010 for a project, and noticed the following code still doesn't build using the non-standards compliant compiler:
...
PHP function overloading
...() and func_get_arg() to get the arguments passed, and use them normally.
For example:
function myFunc() {
for ($i = 0; $i < func_num_args(); $i++) {
printf("Argument %d: %s\n", $i, func_get_arg($i));
}
}
/*
Argument 0: a
Argument 1: 2
Argument 2: 3.5
*/
myFunc('a', 2, 3.5);
...
How to select a single field for all documents in a MongoDB collection?
...ou only want one field but the document has 10 you have to explictly set 0 for 9 of them? Edit: Nevermind, excluding _id i.e. {field_I_want:1, _id:0} seems to work
– Karl Tryggvason
Oct 11 '16 at 11:07
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Swift equivalent for MIN and MAX macros
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@GoZoner Autocomplete is a great place to search too! Unfortunately, its very wonky for Xcode 6 at the moment...
– Jack
Jun 12 '14 at 14:47
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Approximate cost to access various caches and main memory?
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Here is a Performance Analysis Guide for the i7 and Xeon range of processors. I should stress, this has what you need and more (for example, check page 22 for some timings & cycles for example).
Additionally, this page has some detai...
How to find the installed pandas version
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pip list | findstr pandas - for Windows
– ZygD
Jul 31 at 11:28
add a comment
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BaseException.message deprecated in Python 2.6
...str__ and __repr__ are already implemented in a meaningful way,
especially for the case of only one arg (that can be used as message).
You do not need to repeat __str__ or __init__ implementation or create _get_message as suggested by others.
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Stop pip from failing on single package when installing with requirements.txt
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for mac: cat requirements.txt | xargs -n 1 pip install
– Walty Yeung
Sep 4 '16 at 1:32
5
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Why is __init__() always called after __new__()?
... first step of instance creation. It's called first, and is
responsible for returning a new
instance of your class.
In contrast,
__init__ doesn't return anything; it's only responsible for initializing the
instance after it's been created.
In general, you shouldn't need to
ove...