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Difference between EXISTS and IN in SQL?
...ve a static list to pass:
select * from [table]
where [field] in (1, 2, 3)
When you have a table in an in statement it makes more sense to use a join, but mostly it shouldn't matter. The query optimiser should return the same plan either way. In some implementations (mostly older, such as Micro...
Redirect stderr and stdout in Bash
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31
This syntax is deprecated according to the Bash Hackers Wiki. Is it?
– Salman von Abbas
Jul 11 '12 a...
Why do I need Transaction in Hibernate for read-only operations?
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131
You might actually have reasons to mark transactions as read-only.
Transactions for reading m...
No tests found with test runner 'JUnit 4'
...olved it by renaming one of the test methods to start with "test..." (JUnit3 style) and then all tests are found. I renamed it back to what it was previously, and it still works.
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vertical-align with Bootstrap 3
I'm using Twitter Bootstrap 3, and I have problems when I want to align vertically two div , for example — JSFiddle link :
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Is there a way to 'uniq' by column?
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335
sort -u -t, -k1,1 file
-u for unique
-t, so comma is the delimiter
-k1,1 for the key field ...
Why JSF saves the state of UI components on server?
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edited Sep 10 at 16:36
HoldOffHunger
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answe...
Can I start the iPhone simulator without “Build and Run”?
...veloper Tool menu from either the dock icon or the Xcode menu:
Xcode 3.x
In Xcode 3.x, it lives here:
/Developer/Platforms/iPhoneSimulator.platform/Developer/Applications/iPhone Simulator.app
In some future version of Xcode, it will probably move again, it's a squirrelly little app.
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How does having a dynamic variable affect performance?
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238
I've read dynamic makes the compiler run again, but what it does. Does it have to recompile ...
Get the length of a String
...alMenagerie = "Koala 🐨, Snail 🐌, Penguin 🐧, Dromedary 🐪"
println("unusualMenagerie has \(count(unusualMenagerie)) characters")
// prints "unusualMenagerie has 40 characters"
right from the Apple Swift Guide
(note, for versions of Swift earlier than ...