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What are paramorphisms?
...foldr c n xs)
para c n [] = n
foldr c n [] = n
Some people call paramorphisms "primitive recursion" by contrast with catamorphisms (foldr) being "iteration".
Where foldr's two parameters are given a recursively computed value for each recursive subobject of the input data (here, that...
Boost Statechart vs. Meta State Machine
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As there seems to be much interest, please allow me to give my (obviously biased) opinion, which should therefore be taken with a grain of salt:
MSM is much faster
MSM requires no RTTI or anything virtual
MSM has a more complete UML2 support (for example internal tr...
Configuring so that pip install can work from github
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answered Nov 24 '11 at 11:40
Hugo TavaresHugo Tavares
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Changes in import statement python3
... mloskot
32.1k99 gold badges9494 silver badges115115 bronze badges
answered Aug 29 '12 at 8:08
Michał GórnyMichał Górny
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Python Anaconda - How to Safely Uninstall
I installed Python Anaconda on Mac (OS Mavericks). I wanted to revert to the default version of Python on my Mac. What's the best way to do this? Should I delete the ~/anaconda directory? Any other changes required?
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Add more than one parameter in Twig path
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answered Jan 17 '13 at 11:39
Tac TaceloskyTac Tacelosky
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Can I list-initialize a vector of move-only type?
...nitializer list elements in the current revision of the language.
Specifically, we have:
typedef const E& reference;
typedef const E& const_reference;
typedef const E* iterator;
typedef const E* const_iterator;
const E* begin() const noexcept; // first element
const E* end() const noexce...
Saving vim macros
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The :mkexrc (or :mkvimrc) command can be used to save all the current :map and :set settings to a file. See :help mkexrc for details.
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is_file or file_exists in PHP
...o 10k. The result is:
when the file exists:
is_file x 10000 1.5651218891144 seconds
file_exists x 10000 1.5016479492188 seconds
is_readable x 10000 3.7882499694824 seconds
when the file does not exist:
is_file x 10000 0.23920488357544 seconds
file_exists x 10000 0.22103786468506 seconds ...
Shell command to tar directory excluding certain files/folders
...r.
If you want to archive everything except /usr you can use:
tar -zcvf /all.tgz / --exclude=/usr
In your case perhaps something like
tar -zcvf archive.tgz arc_dir --exclude=dir/ignore_this_dir
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