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foldl versus foldr behavior with infinite lists
...be a frequent source of confusion, so here's a more general overview:
Consider folding a list of n values [x1, x2, x3, x4 ... xn ] with some function f and seed z.
foldl is:
Left associative: f ( ... (f (f (f (f z x1) x2) x3) x4) ...) xn
Tail recursive: It iterates through the list, producing th...
What do pty and tty mean?
... ls, the ls command is sending its output to a pseudo-terminal, the other side of which is attached to the SSH daemon.
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How does std::move() transfer values into RValues?
... as lvalue (and implicit conversion from lvalue to rvalue reference is forbidden by standard).
Here's what happens when we call move with lvalue:
Object a; // a is lvalue
Object b = std::move(a);
and corresponding move instantiation:
// move with [T = Object&]
remove_reference<Object&a...
Why does an overridden function in the derived class hide other overloads of the base class?
Consider the code :
4 Answers
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What is the boundary in multipart/form-data?
...ndicates that no further body parts will follow. Such a delimiter line is identical to the previous delimiter lines, with the addition of two more hyphens after the boundary parameter value.
Here is an example using an arbitrary boundary:
Content-Type: multipart/form-data; charset=utf-8; bounda...
What is a Context Free Grammar?
...eory is related to Theory of Computation. Which is the more philosophical side of Computer Science, about deciding which programs are possible, or which will ever be possible to write, and what type of problems is it impossible to write an algorithm to solve.
A regular expression is a way of descri...
Constructor overloading in Java - best practice
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While there are no "official guidelines" I follow the principle of KISS and DRY. Make the overloaded constructors as simple as possible, and the simplest way is that they only call this(...). That way you only need to check and handle the parameters once a...
What are “Groovy” and “Grails” and what kinds of applications are built using them?
...he existing DB architecture is simple? Could the cumbersome workflow be avoided by migrating the data in the legacy DB to a new DB, and if so would this be hard to do? Thanks.
– Daniel
Apr 8 '15 at 4:41
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Are lists thread-safe?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
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In Matlab, when is it optimal to use bsxfun?
...n of the other array. This is what is called "singleton expasion". As an aside, the singleton dimensions are the ones that will be dropped if you call squeeze.
It is possible that for very small problems, the repmat approach is faster - but at that array size, both operations are so fast that it li...