Re: Compare all array values without a loop

if ( grep { $_ eq $foobar} @array )
{
}
[download]

Update: Use the above code if you really want to compare all array values (which is what you said). If you really want to just know if the value is in the array (and then stop searching), you might try the following, which might perform better in certain situations:

use List::Util qw(first);
if ( first { $_ eq $foobar } @array )
{
}
[download]

--
edan

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Re^2: Compare all array values without a loop by rjbs (Pilgrim) on Oct 19, 2004 at 14:25 UTC
I believe the original poster wanted to know whether every value in the array equalled the given value, not whether it occurred once. Perhaps he could clarify. (Of course, now both answers are available in replies.) rjbs	[reply]
Re^3: Compare all array values without a loop by edan (Curate) on Oct 19, 2004 at 14:41 UTC
I think it's not very clear from the original post, but my assumption was that the poster was looking to solve the "is this value in this list" problem, so that's what I solved. I think this is a far more common problem than "is this list composed exclusively of this value"... don't you? -- edan	[reply]
Re^2: Compare all array values without a loop by ihb (Deacon) on Oct 20, 2004 at 00:21 UTC
Assuming that `$foobar` isn't undefined you should have a definedness check for the return value of first too. `$foobar` may be 0 or "". If `undef` is allowed as comparision value, use `defined( defined $foobar ? first { $_ eq $foobar } @array : first { not defined $array[$_] } 0 .. $#array )` [download] instead. `ihb` See perltoc if you don't know which perldoc to read! Read argumentation in its context!	[reply] [d/l] [select]
Re^2: Compare all array values without a loop by welchavw (Pilgrim) on Oct 20, 2004 at 14:23 UTC
Quantum::Superpositions has any() and all() operations that may fit the bill. I don't know how the performance compares to List::Util and don't have time to check. Its just a fun module.	[reply]
Re^2: Compare all array values without a loop by Anonymous Monk on Oct 19, 2004 at 14:22 UTC
yay, thank you!	[reply]