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SQL multiple column ordering
...ng to sort by multiple columns in SQL, and in different directions. column1 would be sorted descending, and column2 ascending.
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Difference between validate(), revalidate() and invalidate() in Swing GUI
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edited Jun 5 '18 at 10:41
answered Mar 1 '12 at 6:23
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How do I get python's pprint to return a string instead of printing?
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The pprint module has a command named pformat, for just that purpose.
From the documentation:
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Rails - Validate Presence Of Association?
... B. I have a business requirement that an insert into A requires at least 1 associated record to B. Is there a method I can call to make sure this is true, or do I need to write a custom validation?
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How to connect an existing SQL Server login to an existing SQL Server database user of same name
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edited Oct 31 '18 at 12:26
Oreo
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answered Jun 29 '10 ...
When to use SELECT … FOR UPDATE?
...hout specifying FOR UPDATE explicitly.
To solve this problem, Thread 1 should SELECT id FROM rooms FOR UPDATE, thereby preventing Thread 2 from deleting from rooms until Thread 1 is done. Is that correct?
This depends on the concurrency control your database system is using.
MyISAM in MySQ...
How to store CGRect values in NSMutableArray?
...ay mutableArray];
[array addObject:[NSValue valueWithCGRect:CGRectMake(0,0,10,10)]];
CGRect someRect = [[array objectAtIndex:0] CGRectValue];
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How to get unique values in an array
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Since I went on about it in the comments for @Rocket's answer, I may as well provide an exampl...
adb update a non-market apk?
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answered Mar 10 '10 at 8:17
Vidar VestnesVidar Vestnes
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How to interactively (visually) resolve conflicts in SourceTree / git
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From SourceTree, click on Tools->Options. Then on the "General" tab, make sure to check th...