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What is better, adjacency lists or adjacency matrices for graph problems in C++?
...e can improve the space-efficiency of the adjacency matrix by using a hash table where the keys are pairs of vertices (undirected only).
Iteration and lookup
Adjacency lists are a compact way of representing only existing edges. However, this comes at the cost of possibly slow lookup of specific e...
Detecting when the 'back' button is pressed on a navbar
...s run through an example. Say you have three view controllers:
ListVC: A table view of things
DetailVC: Details about a thing
SettingsVC: Some options for a thing
Lets follow the calls on the detailVC as you go from the listVC to settingsVC and back to listVC
List > Detail (push detailVC) De...
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
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Returning 'IList' vs 'ICollection' vs 'Collection'
...of the items and this order could change at any time, if the internal hash table is re-organized.
– Olivier Jacot-Descombes
Jan 2 '15 at 17:07
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Difference between Char.IsDigit() and Char.IsNumber() in C#
...DecimalDigitNumber.
I wrote this bit of code to indicate which is which: (Table isn't full due to allowed post size, but you should be able to generate it and it's only for example purposes anyway)
[Test]
public void IsNumberTest()
{
var numberLikes = new[] { UnicodeCategory.De...
Finding all cycles in a directed graph
...ind a valid route, it depends on your data structure. For me it was a sql table full of valid route possibilities so I had to build a query to get the valid destinations given a source.
Problem 2)
Push each node as you find them into a collection as you get them, this means that you can see if you...
Generating a UUID in Postgres for Insert statement?
...oint of my comment, though. Your original answer implies that v4 is not suitable for large datasets due to a higher probability of collision than v1. This is misleading and possibly false, though it is hard to calculate the collision probability for v1 because it is so implementation-dependent.
...
What does f+++++++++ mean in rsync logs?
...to determine what changed. To decode each bit's meaning, use the following table.
Explanation of each bit position and value in rsync's output:
YXcstpoguax path/to/file
|||||||||||
||||||||||╰- x: The extended attribute information changed
|||||||||╰-- a: The ACL information changed
|||||||...
What do linkers do?
...ood" when you convert a source file (such as a C or C++ file) into an executable file (an executable file is a file that can be executed on your machine or someone else's machine running the same machine architecture).
Under the hood, when a program is compiled, the compiler converts the source fi...
HTML minification? [closed]
...
Perhaps try HTML Compressor, here's a before and after table showing what it can do (including for Stack Overflow itself):
It features many selections for optimizing your pages up to and including script minimizing (ompressor, Google Closure Compiler, your own compressor) wher...