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Match whitespace but not newlines
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Perl versions 5.10 and later support subsidiary vertical and horizontal character classes, \v and \h, as well as the generic whitespace character class \s
The cleanest solution is to use the horizontal whitespace character class \h. This will ...
Using an integer as a key in an associative array in JavaScript
When I create a new JavaScript array, and use an integer as a key, each element of that array up to the integer is created as undefined.
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How Do I Fetch All Old Items on an RSS Feed?
I've been experimenting with writing my own RSS reader. I can handle the "parse XML" bit. The thing I'm getting stuck on is "How do I fetch older posts?"
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JavaScript Chart Library
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There is a growing number of Open Source and commercial solutions for pure JavaScript charting that do not require Flash. In this response I will only present Open Source options.
There are 2 main classes of JavaScript solutions for graphics that do not require Fla...
What does “Document-oriented” vs. Key-Value mean when talking about MongoDB vs Cassandra?
...hat does going with a document based NoSQL option buy you over a KV store, and vice-versa?
4 Answers
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Read/Write 'Extended' file properties (C#)
...t is in c#:
Note, you have to add a reference to Microsoft Shell Controls and Automation from the COM tab of the References dialog.
public static void Main(string[] args)
{
List<string> arrHeaders = new List<string>();
Shell32.Shell shell = new Shell32.Shell();
Shell32.Fol...
How can I find the location of origin/master in git, and how do I change it?
...ecks if the remote is missing commits (compared to your local repository), and if so, by how many commits. If you push all your changes to "origin", both will be in sync, so you wont get that message.
2. If it's somewhere else, how do I turn my laptop into the 'origin/master'?
There is no poin...
How can a Java variable be different from itself?
...same with Double.NaN.
From JLS §15.21.1. Numerical Equality Operators == and !=:
Floating-point equality testing is performed in accordance with the rules of the IEEE 754 standard:
If either operand is NaN, then the result of == is false but the result of != is true.
Indeed, the test x!=x is tru...
Question mark and colon in JavaScript
...rm of: condition ? value-if-true : value-if-false
Think of the ? as "then" and : as "else".
Your code is equivalent to
if (max != 0)
hsb.s = 255 * delta / max;
else
hsb.s = 0;
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Retrieve filename from file descriptor in C
...Linux can track renames in some cases). To verify, stat the filename given and fstat the fd you have, and make sure st_dev and st_ino are the same.
Of course, not all file descriptors refer to files, and for those you'll see some odd text strings, such as pipe:[1538488]. Since all of the real filen...