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What is the difference between `after_create` and `after_save` and when to use which?
Are after_create and after_save the same as per functionality?
3 Answers
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How to validate an email address in PHP
...r_var($email, FILTER_VALIDATE_EMAIL)) {
// invalid emailaddress
}
Additionally you can check whether the domain defines an MX record:
if (!checkdnsrr($domain, 'MX')) {
// domain is not valid
}
But this still doesn't guarantee that the mail exists. The only way to find that out is by sen...
Where is the “Fold” LINQ Extension Method?
...ate(1.0, (prod, next) => prod * next);
See MSDN for more information. It lets you specify a seed and then an expression to calculate successive values.
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What is a pre-revprop-change hook in SVN, and how do I create it?
I wanted to edit a log comment in the repository browser and received an error message that no pre-revprop-change hook exists for the repository. Besides having a scary name, what is a pre-revprop-change hook, and how do I create it?
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Call a Server-side Method on a Resource in a RESTful Way
... RESTful design?
The RESTful principles bring the features that make web sites easy (for a random human user to "surf" them) to the web services API design, so they are easy for a programmer to use. REST isn't good because it's REST, it's good because it's good. And it is good mostly because it is ...
“sending 'const NSString *' to parameter of type 'NSString *' discards qualifiers” warning
...nstant string (const NSString *), you are passing something different than it expects.
Besides, NSString objects are already immutable, so making them const NSString is meaningless.
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How to make an ImageView with rounded corners?
In Android, an ImageView is a rectangle by default. How can I make it a rounded rectangle (clip off all 4 corners of my Bitmap to be rounded rectangles) in the ImageView?
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How to check if an intent can be handled from some activity?
I have this method so far , but it came up like something is missing
6 Answers
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Mac OS X - EnvironmentError: mysql_config not found
...re a few things you could try:
Try running which mysql_config from bash. It probably won't be found. That's why the build isn't finding it either. Try running locate mysql_config and see if anything comes back. The path to this binary needs to be either in your shell's $PATH environment variable, ...
Get the current displaying UIViewController on the screen in AppDelegate.m
....window.rootViewController;
Once you know the root view controller, then it depends on how you have built your UI, but you can possibly find out a way to navigate through the controllers hierarchy.
If you give some more details about the way you defined your app, then I might give some more hint....