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How can I hash a password in Java?
...nal String ALGORITHM = "PBKDF2WithHmacSHA1";
private static final int SIZE = 128;
private static final Pattern layout = Pattern.compile("\\$31\\$(\\d\\d?)\\$(.{43})");
private final SecureRandom random;
private final int cost;
public PasswordAuthentication()
{
this(DEFAULT_COST)...
What does extern inline do?
...Jo So
19.1k66 gold badges3232 silver badges5454 bronze badges
answered Oct 19 '08 at 15:35
puetzkpuetzk
9,36633 gold badges2121 si...
How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
...it up quicker.
Further information: Speed Up Your JavaScript - Nicholas C. Zakas
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Generating random integer from a range
...min + (rand() % static_cast<int>(max - min + 1))
Except when the size of the range is a power of 2, this method produces biased non-uniform distributed numbers regardless the quality of rand(). For a comprehensive test of the quality of this method, please read this.
...
How does RewriteBase work in .htaccess
... RewriteBase /~new/
# add trailing slash if missing
rewriteRule ^(([a-z0-9\-]+/)*[a-z0-9\-]+)$ $1/ [NC,R=301,L]
This is a real rule I used to ensure that URLs have a trailing slash. This will convert
http://www.example.com/~new/page
to
http://www.example.com/~new/page/
By having the ...
What would cause an algorithm to have O(log n) complexity?
... steps to reach 1. Thus any algorithm that repeatedly divides the input size by some fraction will need O(log n) iterations to terminate. Those iterations might take a lot of time and so the net runtime needn't be O(log n), but the number of steps will be logarithmic.
So where does this come up? ...
RegEx for matching UK Postcodes
...he RegEx supplied by the UK Government was:
([Gg][Ii][Rr] 0[Aa]{2})|((([A-Za-z][0-9]{1,2})|(([A-Za-z][A-Ha-hJ-Yj-y][0-9]{1,2})|(([A-Za-z][0-9][A-Za-z])|([A-Za-z][A-Ha-hJ-Yj-y][0-9][A-Za-z]?))))\s?[0-9][A-Za-z]{2})
As pointed out on the Wikipedia discussion, this will allow some non-real postcodes...
How does a Breadth-First Search work when looking for Shortest Path?
...ll predecessors are set to empty. In your example, you set A's distance to zero, and then proceed with the BFS. On each step you check if you can improve the distance of a descendant, i.e. the distance from the origin to the predecessor plus the length of the edge that you are exploring is less than...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
... answered Feb 6 '14 at 20:12
ziggzigg
16.4k55 gold badges3131 silver badges5252 bronze badges
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Mediator Vs Observer Object-Oriented Design Patterns
...ly.
Source: dofactory
Example:
The observer pattern:
Class A, can have zero or more observers of type O registered with it. When something in A is changed it notifies all of the observers.
The mediator pattern:
You have some number of instances of class X (or maybe even several different types:...