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SQL JOIN vs IN performance?
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Funny you mention that, I did a blog post on this very subject.
See Oracle vs MySQL vs SQL Server: Aggregation vs Joins
Short answer: you have to test it and individual databases vary a lot.
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No Main() in WPF?
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It is generated during build, but you can provide your own (disambiguating it in project-properties as necessary). Look in obj/debug for an app file; I have (courtesy of "C# 2010 Express") App.g.i.cs with:
namespace WpfApplication1 {
/// <summary>
/// Ap...
@try - catch block in Objective-C
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emacs create new file with ido enabled
I reciently switched to emacs starter kit which includes the ido package.
4 Answers
4
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Eclipse JPA Project Change Event Handler (waiting)
...ed up manually removing the org.eclipse.jpt features and plugins.
What I did was:
1.) exit eclipse
2.) go to my eclipse install directory
cd eclipse
and execute these steps:
*nix:
mkdir disabled
mkdir disabled/features disabled/plugins
mv plugins/org.eclipse.jpt.* disabled/plugins
mv featu...
How do I ALTER a PostgreSQL table and make a column unique?
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How do I change tab size in Vim?
...as to how to set things up, you'll need to read Vim docs on tabstop, shiftwidth, softtabstop and expandtab. The most interesting bit is found under expandtab (:help 'expandtab):
There are four main ways to use tabs in Vim:
Always keep 'tabstop' at 8, set 'softtabstop' and 'shiftwidth' to 4 (or 3 o...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
... dialog box (press Win+R), then type: services.msc
Then search for World Wide Web Publishing Service (WWW-Publishing Service) and Web Deployment Agent Service and stop them. You should also disable them.
Start Apache again with XAMPP :)
Link Ref: https://www.sitepoint.com/unblock-port-80-on-windo...
Delete/Reset all entries in Core Data?
... delete the SQLite file - but I choose to do it by purging the tables individually with a functions:
- (void) deleteAllObjects: (NSString *) entityDescription {
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:en...
how to append a list object to another
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