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What does “coalgebra” mean in the context of programming?
...structures which is pretty much incomprehensible to me. Can anyone please explain what coalgebras mean in the context of programming, what is their significance, and how they relate to objects and comonads?
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What is “Argument-Dependent Lookup” (aka ADL, or “Koenig Lookup”)?
What are some good explanations on what argument dependent lookup is? Many people also call it Koenig Lookup as well.
4 Ans...
How can I remove a trailing newline?
...ly removes the input record separator from the end. That's a newline on Unixy things, but may be different (e.g. Windows) and it's mutable. Is there a way to remove that value only once from the end of a string?
– brian d foy
Nov 8 '08 at 21:04
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C default arguments
...e lack of checking when using varargs.
– dmckee --- ex-moderator kitten
Sep 24 '09 at 15:03
16
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Define all functions in one .R file, call them from another .R file. How, if possible?
How do I call functions defined in abc.R file in another file, say xyz.R?
1 Answer
1
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Add SUM of values of two LISTS into new LIST
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The zip function is useful here, used with a list comprehension.
[x + y for x, y in zip(first, second)]
If you have a list of lists (instead of just two lists):
lists_of_lists = [[1, 2, 3], [4, 5, 6]]
[sum(x) for x in zip(*lists_of_lists)]
# -> [5, 7, 9]
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Error to install Nokogiri on OSX 10.9 Maverick?
I upgraded my OSX (Lion) to Mavericks and I can't install Nokogiri for my projects.
30 Answers
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What is a simple/minimal browserconfig.xml for a web site
...on't want to see the 404 Not Found messages as IE looks for browserconfig.xml scrolling by in my log files.
6 Answers
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Why do objects of the same class have access to each other's private data?
... meaningful per-object access control at compile time". Why not? In void X::f(X&x), the compiler is easily capable of distinguishing this->a and x.a. It's not (always) possible for the compiler to know that *this and x are actually the same object if x.f(x) is invoked, but I could very well...
Explain Morris inorder tree traversal without using stacks or recursion
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If I am reading the algorithm right, this should be an example of how it works:
X
/ \
Y Z
/ \ / \
A B C D
First, X is the root, so it is initialized as current. X has a left child, so X is made the rightmost right child of X's left subtree -- the immediat...