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in iPhone App How to detect the screen resolution of the device
...it with the screen size of the iOS device
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Set the initial view controller to be the root view controller of the window object
self.window.rootViewController = initialViewController;
/...
Jquery to change form action
...e jQuery.attr() in your click handler:
$("#myform").attr('action', 'page1.php');
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selecting unique values from a column
...licates
BTW: using explicit column names in SELECT uses less resources in PHP when you're getting a large result from MySQL
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How different is Objective-C from C++? [closed]
...e-C doesn't allow objects to be created on the stack - all objects must be allocated from the heap (either explicitly with an alloc message, or implicitly in an appropriate factory method).
Like C++, Objective-C has both structs and classes. However, where in C++ they are treated as almost exactly t...
How to convert a string to lower case in Bash?
...uby`
Or Perl (probably my favorite):
b=`perl -e "print lc('$a');"`
Or PHP:
b=`php -r "print strtolower('$a');"`
Or Awk:
b=`echo "$a" | awk '{ print tolower($1) }'`
Or Sed:
b=`echo "$a" | sed 's/./\L&/g'`
Or Bash 4:
b=${a,,}
Or NodeJS if you have it (and are a bit nuts...):
b=`e...
Mocking Extension Methods with Moq
...od is a new field of the class which each instance of the class now has to allocate one more field. It's rare that this matters, but sometimes it does depending on the number of instances you're allocating at any one time. You can work around this problem by making _DoWorkMethod static. The down...
How to free memory in Java?
...
Java uses managed memory, so the only way you can allocate memory is by using the new operator, and the only way you can deallocate memory is by relying on the garbage collector.
This memory management whitepaper (PDF) may help explain what's going on.
You can also call Sy...
How does MongoDB sort records when no sort order is specified?
...kloads it is desirable for the storage engine to try to reuse available preallocated space and make decisions about how to most efficiently store data on disk and in memory.
Without any query criteria, results will be returned by the storage engine in natural order (aka in the order they are found)...
When to Redis? When to MongoDB? [closed]
...
Redis. Let’s say you’ve written a site in php; for whatever reason, it becomes popular and it’s ahead of its time or has porno on it. You realize this php is so freaking slow, "I’m gonna lose my fans because they simply won’t wait 10 seconds for a page." You ha...
What is the best way to prevent session hijacking?
...nt != $_SESSION['ident'])
{
end_session();
header("Location: login.php");
// add some fancy pants GET/POST var headers for login.php, that lets you
// know in the login page to notify the user of why they're being challenged
// for login again, etc.
}
What this does is capture ...