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What is the naming convention in Python for variable and function names?
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887
See Python PEP 8: Function and Variable Names:
Function names should be lowercase, with words...
How to format a Java string with leading zero?
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289
In case you have to do it without the help of a library:
("00000000" + "Apple").substring("App...
How to make unicode string with python3
... Python3.
Assuming that text is a bytes object, just use text.decode('utf-8')
unicode of Python2 is equivalent to str in Python3, so you can also write:
str(text, 'utf-8')
if you prefer.
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Listing only directories in UNIX
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answered Sep 8 '10 at 11:45
David HancockDavid Hancock
13.9k44 gold badges3737 silver badges4343 bronze badges
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Comparing two dataframes and getting the differences
...f.reindex(idx)
Date Fruit Num Color
9 2013-11-25 Orange 8.6 Orange
8 2013-11-25 Apple 22.1 Red
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Extracting the last n characters from a string in R
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288
I'm not aware of anything in base R, but it's straight-forward to make a function to do this us...
What's the difference between __PRETTY_FUNCTION__, __FUNCTION__, __func__?
...it is specified as containing "an implementation-defined string" (C++11 §8.4.1[dcl.fct.def.general]/8), which is not quite as useful as the specification in C. (The original proposal to add __func__ to C++ was N1642).
__FUNCTION__ is a pre-standard extension that some C compilers support (includin...
Haskell error parse error on input `='
...a let to define things in it.
Prelude> let f x = x * 2
Prelude> f 4
8
Starting from GHC 8.0.1, top-level bindings are supported in GHCi, so OP's code will work without change.
GHCi, version 8.0.1.20161213: http://www.haskell.org/ghc/ :? for help
Prelude> f x = x * 2
Prelude> f 4
8
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