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psql: FATAL: role “postgres” does not exist
...R;
CREATE DATABASE postgres WITH OWNER postgres;
But since your postgres.app setup does not seem to do this, you also should not. Simple adapt the tutorial.
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How should I use try-with-resources with JDBC?
...he end of the resource list. The advantage of using two try blocks is that all of your code is present up front so you don't have to refer to a separate method:
public List<User> getUser(int userId) {
String sql = "SELECT id, username FROM users WHERE id = ?";
List<User> users =...
Creating an abstract class in Objective-C
I'm originally a Java programmer who now works with Objective-C. I'd like to create an abstract class, but that doesn't appear to be possible in Objective-C. Is this possible?
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Android Fatal signal 11 (SIGSEGV) at 0x636f7d89 (code=1). How can it be tracked down?
...e NDK documents. Ever since the release NDK-r6, it has provided a utility called ndk-stack.
Following is the content from official NDK documents with the NDK-r9 tar ball.
Overview:
ndk-stack is a simple tool that allows you to filter stack traces as they appear in the output of 'adb logcat' and r...
Xcode without Storyboard and ARC
...gWithOptions: (NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
TestViewController *test = [[TestViewController alloc] initWithNibName:@"TestViewController" bundle...
Can't install Ruby under Lion with RVM – GCC issues
...was trying to install SiriProxy on a clean Lion installation on Xcode from App Store
I kept getting errors like :
The provided CC(/usr/bin/gcc) is LLVM based.
bash-3.2$ rvm install 1.9.3
ERROR: The provided CC(/usr/bin/gcc) is LLVM based, it is not yet fully supported by ruby and gems, please read...
Proper way to declare custom exceptions in modern Python?
...tionError(Exception):
def __init__(self, message, errors):
# Call the base class constructor with the parameters it needs
super(ValidationError, self).__init__(message)
# Now for your custom code...
self.errors = errors
That way you could pass dict of error me...
Log exception with traceback
... log file
ERROR:root:Got exception on main handler
Traceback (most recent call last):
File "/tmp/teste.py", line 9, in <module>
run_my_stuff()
NameError: name 'run_my_stuff' is not defined
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Are there strongly-typed collections in Objective-C?
...hich means that the runtime doesn't care about the type of an object since all objects can receive messages. When you add an object to a built-in collection, they are just treated as if they were type id. But don't worry, just send messages to those objects like normal; it will work fine (unless of ...
How do I convert a Ruby class name to a underscore-delimited symbol?
...hich is likely the case. Advantages:
easier to understand your code
your app will still work even in the (unlikely) event that Rails decides to change a naming convention.
BTW, human has the advantage of being I18N aware.
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