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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
... INTO `usage`
(`thing_id`, `times_used`, `first_time_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`times_used` = `times_used` + 1
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How does View Controller Containment work in iOS 5?
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edited May 23 '17 at 12:17
Community♦
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answered Dec 5 '11 at 0:53
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'Specified condition “$(PackageAsSingleFile)” evaluates to “” instead of a boolean?
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answered Apr 1 '13 at 20:04
Rusty DivineRusty Divine
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Why does GCC generate such radically different assembly for nearly the same C code?
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List goals/targets in GNU make that contain variables in their definition
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answered Sep 3 '10 at 2:02
Jack KellyJack Kelly
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Debug a java application without starting the JVM with debug arguments
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Zitrax
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answered Dec 17 '08 at 22:27
McDowellMcDowell
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How do I use define_method to create class methods?
..._class.define_method
– Pyro
Feb 5 '13 at 5:41
@Pyro Just to clarify, would you just go singleton_class.define_method :...
Why isn't there a Guid.IsNullOrEmpty() method
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236
Guid is a value type, so a variable of type Guid can't be null to start with. If you want to kn...
C++11 emplace_back on vector?
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Red XIIIRed XIII
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Are 2^n and n*2^n in the same time complexity?
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232
You will have to go to the formal definition of the big O (O) in order to answer this question....