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How to cast int to enum in C++?
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No performance improvements. Compiler just deduces the type automatically if you specify with "auto". If you decide to change your enum name in the future, you will be modifying your code less since compiler will automatically deduce the correct type nam...
Is there a timeout for idle PostgreSQL connections?
... have a buggy application that leaks connections anyway; I very strongly recommend configuring PgBouncer.
A TCP keepalive won't do the job here, because the app is still connected and alive, it just shouldn't be.
In PostgreSQL 9.2 and above, you can use the new state_change timestamp column and th...
CSS selector - element with a given child [duplicate]
...lement based on its contents. My understanding is it was chosen to provide compatibility with jQuery's custom :has() pseudo-selector*.
In any event, continuing the example from above, to select the p element that contains a span one could use:
p:has(span) {
color: red;
}
* This makes me wonder...
How do I compile a Visual Studio project from the command-line?
I'm scripting the checkout, build, distribution, test, and commit cycle for a large C++ solution that is using Monotone , CMake , Visual Studio Express 2008, and custom tests.
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How to add to an existing hash in Ruby
...e new hashes from arrays
Hash[[[:a, "a"]]]
# => {:a=>"a"}
When it comes to "inserting" things into a Hash you may do it one at a time, or use the merge method to combine hashes:
{ :a => 'a' }.merge(:b => 'b')
# {:a=>'a',:b=>'b'}
Note that this does not alter the original hash...
How do you overcome the HTML form nesting limitation?
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179
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What does PermGen actually stand for?
... no longer allocated in the permanent generation of the Java heap": oracle.com/technetwork/java/javase/jdk7-relnotes-418459.html
– almalkawi
Dec 20 '13 at 18:41
30
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Using the Swift if let with logical AND operator &&
...success!")
}
For those now using Swift 3, "where" has been replaced by a comma. The equivalent would therefore be:
if let w = width as? Int, w < 500
{
println("success!")
}
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