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Set default CRAN mirror permanent in R
How can I set a specific CRAN mirror permanently in R?
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What is __future__ in Python used for and how/when to use it, and how it works
...ently appears in Python modules. I do not understand what __future__ is for and how/when to use it even after reading the Python's __future__ doc .
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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
What are the precise rules for when you can omit (omit) parentheses, dots, braces, = (functions), etc.?
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What is the difference between List (of T) and Collection(of T)?
I've seen them used in a lot of the same ways, and I am worried I'm about to go down a path in design that is irreversible if I don't understand this better. Also, I am using .NET.
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How to check if an array value exists?
How can I check if $something['say'] has the value of 'bla' or 'omg' ?
12 Answers
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Is the list of Python reserved words and builtins available in a library?
Is the list of Python reserved words and builtins available in a library? I want to do something like:
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What arguments are passed into AsyncTask?
...tly should I put, and where exactly will it go? Do I need to include all 3 or can I include 1,2,20?
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Reshape three column data frame to matrix (“long” to “wide” format) [duplicate]
...data frame, which is probably what most readers of this answer will want. For a heatmap, though, you would need to convert this to a true matrix.
library(tidyr)
pivot_wider(tmp, names_from = y, values_from = z)
## # A tibble: 2 x 4
## x a b c
## <fct> <dbl> <dbl> &...
Does Java read integers in little endian or big endian?
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Use the network byte order (big endian), which is the same as Java uses anyway. See man htons for the different translators in C.
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What is std::move(), and when should it be used?
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Wikipedia Page on C++11 R-value references and move constructors
In C++11, in addition to copy constructors, objects can have move constructors.
(And in addition to copy assignment operators, they have move assignment operators.)
The move constructor is used instead of the copy const...