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Side-by-side plots with ggplot2
...ion grid.arrange() in the gridExtra package will combine multiple plots; this is how you put two side by side.
require(gridExtra)
plot1 <- qplot(1)
plot2 <- qplot(1)
grid.arrange(plot1, plot2, ncol=2)
This is useful when the two plots are not based on the same data, for example if you want...
How to version control a record in a database
...e queries against the FOO table. Happy days.
Then, I would create a FOO_HISTORY table. This has all the columns of the FOO table. The primary key is the same as FOO plus a RevisionNumber column. There is a foreign key from FOO_HISTORY to FOO. You might also add columns related to the revision ...
How can I open a URL in Android's web browser from my application?
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Try this:
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"));
startActivity(browserIntent);
That works fine for me.
As for the missing "http://" I'd just do something like this:
if (!url....
Python read-only property
...ue, or a value read from some static datasource), the getter-only property is generally the preferred pattern.
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Delete/Reset all entries in Core Data?
...rogrammatically, using the NSFileManager:removeItemAtPath:: method.
NSPersistentStore *store = ...;
NSError *error;
NSURL *storeURL = store.URL;
NSPersistentStoreCoordinator *storeCoordinator = ...;
[storeCoordinator removePersistentStore:store error:&error];
[[NSFileManager defaultManager] rem...
In MySQL what does “Overhead” mean, what is bad about it, and how to fix it?
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It appears that the overhead is temporary diskspace that the database used to run some of the queries, so you should only worry if this gets really high.
You can compare 'Optimizing the table' with the defragmenting of your hard drive.
I quote:
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What is the second parameter of NSLocalizedString()?
What is the *comment parameter in:
3 Answers
3
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Suppress warning “Category is implementing a method which will also be implemented by its primary cl
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A category allows you to add new methods to an existing class. If you want to reimplement a method that already exists in the class, you typically create a subclass instead of a category.
Apple documentation: Customizing existing classes
If the name of a method declare...
Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
...emulator), and you can start your emulator instantly. You have to enable this feature while creating a new AVD or you can just create it later by editing the AVD.
Also I have increased the Device RAM Size to 1024 which results in a very fast emulator.
Refer to the given below screenshots for more ...
Visual Studio: ContextSwitchDeadlock
...ve been getting an error message that I can't resolve. It originates from Visual Studio or the debugger. I'm not sure whether the ultimate error condition is in VS, the debugger, my program, or the database.
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