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Regular Expression for alphanumeric and underscores
...ns, and probably a lot of other languages as well.
Breaking it down:
^ : start of string
[ : beginning of character group
a-z : any lowercase letter
A-Z : any uppercase letter
0-9 : any digit
_ : underscore
] : end of character group
* : zero or more of the given characters
$ : end of string
If ...
What Computer Science concepts should I know? [closed]
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You can start with a Wikipedia article I linked to - it's both quite simple and mathematically correct.
– sharptooth
Apr 14 '09 at 12:56
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OwinStartup not firing
I had the OwinStartup configuration code working perfectly and then it stopped working. Unfortunately I'm not sure exactly what I did to get it to stop working and am having a really hard time figuring it out.
...
How much is the overhead of smart pointers compared to normal pointers in C++?
...shared_ptrs and you have not enough memory to the point that your computer starts wrinkling, like an old lady being plummeted to the ground by an unbearable force from afar.
What would make your code slower is sluggish searches, unnecessary loop processing, huge copies of data, and a lot of write op...
How to log a method's execution time exactly in milliseconds?
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NSDate *methodStart = [NSDate date];
/* ... Do whatever you need to do ... */
NSDate *methodFinish = [NSDate date];
NSTimeInterval executionTime = [methodFinish timeIntervalSinceDate:methodStart];
NSLog(@"executionTime = %f", executionTi...
What are the differences between a multidimensional array and an array of arrays in C#?
...es++)
{
var timer = new Stopwatch();
timer.Start();
var jagged = new int[dim][][];
for(var i = 0; i < dim; i++)
{
jagged[i] = new int[dim][];
for(var j = 0; j < dim; j++)
{
...
SQL Server Installation - What is the Installation Media Folder?
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Clicking the exe starts the installer, which unzips files to a temporary location and cleans them up afterward. The zip rename isn't necessary if you open the exe directly with 7zip, but it does help clarify the answer and show that the exe i...
How to use wait and notify in Java without IllegalMonitorStateException?
...condition after they wake up to see whether they need to wait again or can start processing.
Use the same object for calling wait() and notify() method; every object has its own lock so calling wait() on object A and notify() on object B will not make any sense.
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How to get current relative directory of your Makefile?
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From the GNU Make manual (page 51): " when GNU make starts (after it has processed any -C options) it sets the variable CURDIR to the pathname of the current working directory." Not the location of where the Makefile is located - although, they might be the same.
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Generating an MD5 checksum of a file
...lock, checksum)
return checksum & 0xffffffff
Note that this must start off with the empty string, as Adler sums do indeed differ when starting from zero versus their sum for "", which is 1 -- CRC can start with 0 instead. The AND-ing is needed to make it a 32-bit unsigned integer, which e...