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Re: OT: and even in Dart .........Re: simple session question [message #175735 is a reply to message #175729] Sat, 22 October 2011 23:22 Go to previous messageGo to previous message
Thomas Mlynarczyk is currently offline  Thomas Mlynarczyk
Messages: 131
Registered: September 2010
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Senior Member
The Natural Philosopher schrieb:

> The point is that bracketing is supposed to absolutely ensure that
> nothing outside gets done till the inside is complete.

And that's exactly what happens:

// $foo = 0;
[1] Evaluate 0 // result: 0
[2] Assign result of [1] to $foo // $foo = 0
// $foo = ($foo++);
[3] Evaluate operation "post-increment" on $foo // ($foo++)
[3.1] Set return value to current $foo // result: 0
[3.2] Add 1 to $foo // $foo = 1
[3.3] Return result // 0
[4] Assign result of [3] to $foo // $foo = 0

Thus, for a few nanoseconds, $foo is indeed 1, until this increment is
undone in [4] by reassigning $foo its old value.

> So $a=($foo++); should be the same as
> $foo++;
> $a=$foo;

No. That would be $a = ++$foo.

Greetings,
Thomas

--
Ce n'est pas parce qu'ils sont nombreux à avoir tort qu'ils ont raison!
(Coluche)
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