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Why is this F# code so slow?
...unction is not generic (it just takes int). You can improve the F# version by adding type annotations (to get the same thing as in C#):
let min3(a:int, b, c) = min a (min b c)
...or by making min3 as inline (in which case, it will be specialized to int when used):
let inline min3(a, b, c) = min ...
Use email address as primary key?
...ompany's point of view, a telephone number uniquely identifies a customer, by definition. Yes, you can say, "But what if there are two or three people who might answer when you call that number?" But this is irrelevant. From the phone company's point of view, by definition this is one customer. (con...
IntelliJ and Tomcat…changed files are not automatically recognized by Tomcat
... you have the registry compiler.automake.. enabled it pushes your changes by only hit save too.
– Radu Toader
Oct 15 '16 at 18:48
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Wait for a process to finish
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tail works under the hood by polling with kill(pid, SIG_0) to a process (discovered using strace).
– Att Righ
Nov 21 '17 at 1:47
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Difference between this and self in self-type annotations?
...ed( e: ActionEvent ) {
// this.setVisible( false ) --> shadowed by JButton!
frame.setVisible( false )
}
})
})
}
The third variant,
trait A { this: B => ... }
does not introduce an alias for this; it just sets the self type.
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Where are $_SESSION variables stored?
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The location of the $_SESSION variable storage is determined by PHP's session.save_path configuration. Usually this is /tmp on a Linux/Unix system. Use the phpinfo() function to view your particular settings if not 100% sure by creating a file with this content in the DocumentRoot of y...
Why is auto_ptr being deprecated?
... the user/programmer's perspective answer.
First thing first (as pointed by Jerry Coffin in his answer)
auto_ptr could be replaced by shared_ptr or unique_ptr depending upon situation
shared_ptr : If you are concerned about freeing of resource/memory AND if you have more than one function t...
Why `null >= 0 && null
I had to write a routine that increments the value of a variable by 1 if its type is number and assigns 0 to the variable if not, where the variable is initially null or undefined .
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MySQL ON DUPLICATE KEY - last insert id?
...e page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation example:
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() function returns the AUTO_INCR...
What's NSLocalizedString equivalent in Swift?
... That's a very good idea! I also made it a little bit smarter by changing to func localized(comment: String = "") -> String so it becomes smaller and with optional comments :)
– Gui Moura
Jul 1 '15 at 17:58
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