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How do I get the number of elements in a list?
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The len() function can be used with several different types in Python - both built-in types and library types. For example:
>>> len([1,2,3])
3
Official 2.x documentation is here: len()
Official 3.x documentation is here: len()
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C Macro definition to determine big endian or little endian machine?
Is there a one line macro definition to determine the endianness of the machine. I am using the following code but converting it to macro would be too long.
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How to reliably open a file in the same directory as a Python script
... documentation says that if some path is absolute, all other paths left of it are dropped. Therefore, getcwd() is dropped when dirname(__file__) returns an absolute path.
Also, the realpath call resolves symbolic links if any are found. This avoids troubles when deploying with setuptools on Linux sy...
Why does Python code use len() function instead of a length method?
...on that is used to determine the size of a string, but I was wondering why it's not a method of the string object.
9 Answer...
Pandas selecting by label sometimes return Series, sometimes returns DataFrame
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Granted that the behavior is inconsistent, but I think it's easy to imagine cases where this is convenient. Anyway, to get a DataFrame every time, just pass a list to loc. There are other ways, but in my opinion this is the cleanest.
In [2]: type(df.loc[[3]])
Out[2]: pandas.core...
When are C++ macros beneficial? [closed]
The C preprocessor is justifiably feared and shunned by the C++ community. In-lined functions, consts and templates are usually a safer and superior alternative to a #define .
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Node.js - getting current filename
...follow
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edited Mar 6 '15 at 16:27
answered Feb 4 '15 at 10:31
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How to read a single character from the user?
... from the user input? For instance, they press one key at the terminal and it is returned (sort of like getch() ). I know there's a function in Windows for it, but I'd like something that is cross-platform.
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What is the id( ) function used for?
...s several questions:
What is the number returned from the function?
It is "an integer (or long integer) which is guaranteed to be unique and constant for this object during its lifetime." (Python Standard Library - Built-in Functions) A unique number. Nothing more, and nothing less. Think of ...
Windows threading: _beginthread vs _beginthreadex vs CreateThread C++
...nes. Once CreateThread() has returned, _beginthread/ex() takes care of additional bookkeeping to make the C runtime library usable & consistent in the new thread.
In C++ you should almost certainly use _beginthreadex() unless you won't be linking to the C runtime library at all (aka MSVCRT*.dl...