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Convert an image to grayscale in HTML/CSS
...
Following on from brillout.com's answer, and also Roman Nurik's answer, and relaxing somewhat the the 'no SVG' requirement, you can desaturate images in Firefox using only a single SVG file and some CSS.
Your SVG file will look like this...
What command opens Ruby's REPL?
...ram named irb, but since it is just a Ruby library, it can also be invoked from Ruby code and not just from the shell. On Rubinius, IRb can also be invoked by just calling the rbx program without arguments, just like in CPython.
There is also a very nice REPL called Pry, which installs a program na...
How do I shutdown, restart, or log off Windows via a bat file?
...l options:
-f — Forces programs to exit. Prevents the shutdown process from getting stuck.
-t <seconds> — Sets the time until shutdown. Use -t 0 to shutdown immediately.
-c <message> — Adds a shutdown message. The message will end up in the Event Log.
-y — Forces a "yes" answer...
Get type of a generic parameter in Java with reflection
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I want to try to break down the answer from @DerMike to explain:
First, type erasure does not mean that the JDK eliminates type information at runtime. It's a method for allowing compile-time type checking and runtime type compatibility to coexist in the same la...
Exception messages in English?
...ially worked around. The Framework exception code loads the error messages from its resources, based on the current thread locale. In the case of some exceptions, this happens at the time the Message property is accessed.
For those exceptions, you can obtain the full US English version of the messa...
How to read a local text file?
...ally with XMLHttpRequest, you don't get a status returned because it's not from a Webserver)
function readTextFile(file)
{
var rawFile = new XMLHttpRequest();
rawFile.open("GET", file, false);
rawFile.onreadystatechange = function ()
{
if(rawFile.readyState === 4)
{
...
Get free disk space
...
Working code snippet using GetDiskFreeSpaceEx from link by RichardOD.
// Pinvoke for API function
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetDiskFreeSpaceEx(string lpDirec...
What are Transient and Volatile Modifiers?
...rs can be applied to fields of classes1 irrespective of field type. Apart from that, they are unrelated.
The transient modifier tells the Java object serialization subsystem to exclude the field when serializing an instance of the class. When the object is then deserialized, the field will be ini...
How can I validate a string to only allow alphanumeric characters in it?
...to be Unicode "letters". If this is your intention, then fine, but judging from the various regex expressions in the other answers, this is likely not what most considered to be alpha[numeric].
– Dono
Feb 20 '14 at 5:57
...
asp.net mvc put controllers into a separate project
...e convenient to define all my Controllers in each project, but derive them from Controllers in my Shared project:
namespace MyProject1.Controllers
{
public class MyController : MySharedProject.Controllers.MyController
{
// nothing much to do here...
}
}
namespace MySharedProject.Con...