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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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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:
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'printf' vs. 'cout' in C++
... that std::cout is way better than printf, even if the question just asked for differences. Now, there is a difference - std::cout is C++, and printf is C (however, you can use it in C++, just like almost anything else from C). Now, I'll be honest here; both printf and std::cout have their advantage...
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...
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...
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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What are all the uses of an underscore in Scala?
...: K[T])
Ignored variables
val _ = 5
Ignored parameters
List(1, 2, 3) foreach { _ => println("Hi") }
Ignored names of self types
trait MySeq { _: Seq[_] => }
Wildcard patterns
Some(5) match { case Some(_) => println("Yes") }
Wildcard patterns in interpolations
"abc" match { ca...
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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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...
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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