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How to run a function when the page is loaded?
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Why is this program erroneously rejected by three C++ compilers?
I am having some difficulty compiling a C++ program that I've written.
31 Answers
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Python: Making a beep noise
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On Windows, if you want to just make the computer make a beep sound:
import winsound
frequency = 2500 # Set Frequency To 2500 Hertz
duration = 1000 # Set Duration To 1000 ms == 1 second
winsound.Beep(frequency, duration)
The winsound.Beep() can be used wherever...
How can I send mail from an iPhone application
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On iOS 3.0 and later you should use the MFMailComposeViewController class, and the MFMailComposeViewControllerDelegate protocol, that is tucked away in the MessageUI framework.
First add the framework and import:
#import <MessageUI/MFMailComposeViewController.h>
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Is it possible to prevent an NSURLRequest from caching data or remove cached data following a reques
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Split Java String by New Line
...However, this does not work and I also tried by \r\n|\r|n and many other combination of regexes.
Code:
20 Answers
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Different between parseInt() and valueOf() in java?
... There is a difference - the new Object (potentially) allocated by valueOf comes with an overhead (memory for the object, handling, GC), while the plain int is extremely "lightweight". (For the most common values, you'll get references to pre-existing Objects, which helps a tiny bit.)
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jquery .html() vs .append()
...childNodes as a fresh DOM collection.
Note that it's actually a lot more complicated than that, as jQuery does a bunch of cross-browser checks and various other optimisations. E.g. if you pass just <div></div> to jQuery(), jQuery will take a shortcut and simply do document.createElemen...
Retrieving Android API version programmatically
...ince Donut (android 1.6 / API4) so make sure your application is not retro-compatible with Cupcake (android 1.5 / API3) when you use it or your application will crash (thanks to Programmer Bruce for the precision).
Corresponding android documentation is here and here
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