On 12-03-24 11:15 AM, Al wrote:
On 3/23/2012 10:11 PM, Robert Cummings wrote:
On 12-03-23 06:30 PM, Simon Schick wrote:
2012/3/23 Robert Cummings<robert@xxxxxxxxxxxxx>
On 12-03-23 11:16 AM, Arno Kuhl wrote:
it still does not produce the correct result:
0 1 3 6 10 15 21
0 1 3 6 10 15 15
This looks like a bug... the last row should be the same. What version of
PHP are you using? Have you checked the online bug reports?
Hi, Robert
Does not seem like a bug to me ...
http://schlueters.de/blog/archives/141-References-and-foreach.html
What you should do to get the expected result:
Unset the variable after you don't need this reference any longer.
Ah yes... that clued me in. I disagree with the article's generalization with
respect to references since references accomplish some things that cannot be
accomplished otherwise, but even I missed the fact that the second loop was
using a variable that was a reference to the last element of the array as
created in the first loop *lol*. The user's very act of checking their results
was confounding the result... I love it :)
Cheers,
Rob.
Re, your "...that cannot be accomplished otherwise,..." Can you provide some
examples? The only ones I've found are when using create_function() and the
arguments for callback functions. I can't even remember or find in my code an
example of my foreach()loops needed it. Seems, I recall earlier versions of PHP
[<4? ]required references for variables.
After I submitted "...that cannot be accomplished otherwise,...", I
realized it was a patently false statement (a turing machine is a turing
machine :). The intent of the statement though was to indicate the
greater difficulty in achieving something relatively simple with
references. See the other thread "Thinking out loud - continuation". My
post dated 2012-03-24 00:24 shows a process that is cumbersome and
inefficient to implement in another fashion. References are like
pointers... very powerful but with cautions for the unwary.
Cheers,
Rob.
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