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How does a public key verify a signature?
...m trying to get a better grapple on how public/private keys work. I understand that a sender may add a digital signature to a document using his/her private key to essentially obtain a hash of the document, but what I do not understand is how the public key can be used to verify that signature.
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Xcode 'Build and Archive' menu item disabled
I have been using the new 'Build and Archive' feature of the latest Xcode 3.2.3. I like it.
10 Answers
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Adding gif image in an ImageView in android
...copy your GIF image into Asset Folder of your app
create following classes and paste the code
AnimationActivity: -
public class AnimationActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(saved...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...oblems. Packageless servlets work only in specific Tomcat+JDK combinations and this should never be relied upon.
In case of a "plain" IDE project, the class needs to be placed in its package structure inside "Java Resources" folder and thus not "WebContent", this is for web files such as JSP. Belo...
Very simple log4j2 XML configuration file using Console and File appender
I'd like a very simple XML configuration file with a console and a file appender using log4j2.
4 Answers
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What is RSS and VSZ in Linux memory management
What are RSS and VSZ in Linux memory management? In a multithreaded environment how can both of these can be managed and tracked?
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What does `unsigned` in MySQL mean and when to use it?
What does "unsigned" mean in MySQL and when should I use it?
1 Answer
1
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What is the real overhead of try/catch in C#?
So, I know that try/catch does add some overhead and therefore isn't a good way of controlling process flow, but where does this overhead come from and what is it's actual impact?
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How to use setInterval and clearInterval?
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setInterval sets up a recurring timer. It returns a handle that you can pass into clearInterval to stop it from firing:
var handle = setInterval(drawAll, 20);
// When you want to cancel it:
clearInterval(handle);
handle = 0; // I just do this so I know I've cleared the interv...
How to go back (ctrl+z) in vi/vim
... to Vim] there is a shortcut Ctrl + Z when you have done something nasty and want to return to the previous version of the text. Like BACK button in Word. I wonder how can you achieve this behaviour in Vim.
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