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How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
I'm trying to implement search code in my CoreData-based iPhone app. I'm not sure how to proceed. The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confus...
Generate a UUID on iOS from Swift
In my iOS Swift app I want to generate random UUID ( GUID ) strings for use as a table key, and this snippet appears to work:
...
Node.js Best Practice Exception Handling
...s depending on our code architecture:
For synchronous code, if an error happens, return the error:
// Define divider as a syncrhonous function
var divideSync = function(x,y) {
// if error condition?
if ( y === 0 ) {
// "throw" the error safely by returning it
return new Er...
UIRefreshControl without UITableViewController
...nsupported behavior and may change in the future. The only guarantee that Apple makes is that using it according to the provided api (in this case -[UITableViewController setRefreshControl:]) will continue to function.
– Dave DeLong
Sep 21 '12 at 15:01
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QString to char* conversion
...
Well, the Qt FAQ says:
int main(int argc, char **argv)
{
QApplication app(argc, argv);
QString str1 = "Test";
QByteArray ba = str1.toLocal8Bit();
const char *c_str2 = ba.data();
printf("str2: %s", c_str2);
return app.exec();
}
So perhaps you're having other problems. How...
How do I create a custom iOS view class and instantiate multiple copies of it (in IB)?
I am currently making an app that will have multiple timers, which are basically all the same.
4 Answers
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Rails: redirect_to with :error, but flash[:error] empty
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As stated in the Rails API only :notice and :alert are by default applied as a flash hash value. If you need to set the :error value, you can do it like this:
redirect_to show_path, flash: { error: "Insufficient rights!" }
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Redirect using AngularJS
...h outside of the AngularJS digest.
Try doing this on the directive scope.$apply(function() { $location.path("/route"); });
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Error while installing json gem 'mkmf.rb can't find header files for ruby'
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For Xcode 11 on macOS 10.14, this can happen even after installing Xcode and installing command-line tools and accepting the license with
sudo xcode-select --install
sudo xcodebuild -license accept
The issue is that Xcode 11 ships the macOS 10.15 SDK which in...
What does bundle exec rake mean?
...ases, running executables without bundle exec may work, if the executable happens to be installed in your system and does not pull in any gems that conflict with your bundle.
However, this is unreliable and is the source of considerable pain. Even if it looks like it works, it may not work in t...