Ken Foskey schreef:
> Mathew Snyder:
>> Is there an easy way to determine if an item is in an array without
>> iterating through the array and comparing each element to the item
>> in question?
>
> Look up grep.
That still involves iterating and comparing each element, but now done
(faster) by grep.
If the array is already sorted, a binary search would be the way to go.
Otherwise you can use a loop that short-circuits by using "last" if the
item is found.
With smallish arrays, you can even use index(), after stringizing it:
$string = join $;, ('', @array, '');
index($string, "$;$item$;") >= 0 and print "found\n";
or use a regular expression:
$string = join "\n", @array;
/^$item$/m and print "found\n";
> You might be wanting a hash table not an array.
Yes, that is the best answer. Especially if multiple items need to be
tested.
--
Affijn, Ruud
"Gewoon is een tijger."
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