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What's the difference between a continuation and a callback?
...wsing all over the web in search of enlightenment about continuations, and it's mind boggling how the simplest of explanations can so utterly confound a JavaScript programmer like myself. This is especially true when most articles explain continuations with code in Scheme or use monads.
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Real World Example of the Strategy Pattern
...follow
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edited Jan 11 '10 at 15:56
answered Dec 16 '08 at 1:40
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Can you split a stream into two streams?
...can't get two Streams out of one; this doesn't make sense -- how would you iterate over one without needing to generate the other at the same time? A stream can only be operated over once.
However, if you want to dump them into a list or something, you could do
stream.forEach((x) -> ((x == 0) ...
What does functools.wraps do?
... was doing. So, I'm asking this question so that there will be a record of it on StackOverflow for future reference: what does functools.wraps do, exactly?
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What's the difference between lists and tuples?
...tructure, lists have order.
Using this distinction makes code more explicit and understandable.
One example would be pairs of page and line number to reference locations in a book, e.g.:
my_location = (42, 11) # page number, line number
You can then use this as a key in a dictionary to store ...
Using printf with a non-null terminated string
Suppose you have a string which is NOT null terminated and you know its exact size, so how can you print that string with printf in C? I recall such a method but I can not find out now...
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puts vs logger in rails rake tasks
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Put this in application.rb, or in a rake task initialize code
if defined?(Rails) && (Rails.env == 'development')
Rails.logger = Logger.new(STDOUT)
end
This is Rails 3 code. Note that this will override logging to development.log. If you want both STDOUT and de...
What part of Hindley-Milner do you not understand?
...".)
Γ is usually used to refer to an environment or context; in this case it can be thought of as a set of type annotations, pairing an identifier with its type. Therefore x : σ ∈ Γ means that the environment Γ includes the fact that x has type σ.
⊢ can be read as proves or determines. Γ ...
Using arrays or std::vectors in C++, what's the performance gap?
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Using C++ arrays with new (that is, using dynamic arrays) should be avoided. There is the problem you have to keep track of the size, and you need to delete them manually and do all sort of housekeeping.
Using arrays on the stack is also dis...
What is code coverage and how do YOU measure it?
What is code coverage and how do YOU measure it?
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