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Code Golf: Lasers
...&redo}die/x/?true:false,$/
The first line loads the input into %t, a table of the board where $t{99*i+j} holds the character at row i,column j. Then,
%d=split//,'>.^1<2v3' ; ($r)=grep{$d|=$d{$t{$_}}}%t
it searches the elements of %t for a character that matches > ^ < or v, and s...
What is the difference between a port and a socket?
..., W. Richard Stevens)
In most C-derived languages, TCP connections are established and manipulated using methods on an instance of a Socket class. Although it is common to operate on a higher level of abstraction, typically an instance of a NetworkStream class, this generally exposes a reference t...
How do I tell Maven to use the latest version of a dependency?
...e some uncertainties between versions/releases/snapshots in this very nice table here: goo.gl/iDq6PK
– Ev0oD
Oct 13 '14 at 13:13
1
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Is std::vector so much slower than plain arrays?
...ver the buffer.
(The two overloads where added to handle movable, constructable and non-copyable types -- the performance improvement when working on uninitialized data is a bonus).
The push_back solution also does fencepost checking, which slows it down, so it remains slower than the malloc versi...
Merging: Hg/Git vs. SVN
...OT BETTER at merging than SVN. This is obviously anecdotal, but there is a table to follow.
Here are some of the things we found:
SVN used to throw up a lot of tree conflicts in situations where it seemed like it shouldn't. We never got to the bottom of this but it doesn't happen in GIT.
While be...
What is the significance of ProjectTypeGuids tag in the visual studio project file
...(for C# and VB.NET projects) and others have other purposes. The following table lists known project type Guids.
Project Type Description Project Type Guid
Windows (C#) {FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}
Windows (VB.NET) {F184...
Why are regular expressions so controversial? [closed]
... just slow, but the performance of the regex engine can be totally unpredictable when faced with arbitrary (user-supplied) inputs.
– Pacerier
Dec 1 '15 at 21:53
...
Scala: What is a TypeTag and how do I use it?
...flect.ClassTag[List[Int]] =↩
ClassTag[class scala.collection.immutable.List]
As one can see above, they don't care about type erasure, therefore if one wants "full" types TypeTag should be used:
scala> typeTag[List[Int]]
res105: reflect.runtime.universe.TypeTag[List[Int]] = TypeTag[s...
C++ performance challenge: integer to std::string conversion
... first one is a fun implementation that doesn't use any precomputed lookup tables or explicit division/modulo. This one is competitive with the others with gcc and with all but Timo's on msvc (for a good reason that I explain below). The second algorithm is my actual submission for highest performan...
Best practices for reducing Garbage Collector activity in Javascript
...ultiple object allocations. This frequently happens with keys into lookup tables and dynamic DOM node IDs. For example, lookupTable['foo-' + x] and document.getElementById('foo-' + x) both involve an allocation since there is a string concatenation. Often you can attach keys to long-lived objects...