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Postings from January 2011
Brad Gilbert <b2gills <at> gmail.com> writes:
>>Is it possible to find whether an array contains a given string?
>Actually, all you would have to do is make sure that the elements of
>the array are strings.
>
> perl -E '@a = ("1"); say "1 x" ~~ @a'
Thanks. In my original code the array is of strings so I could use this.
But when I dropped into the command line to test behaviour with some one-liners,
I reflexively picked (1, 2, 3) as my example array.
This is a slightly unperlish distinction; usually in Perl it doesn't matter
whether a scalar holds the number 42 or the string '42' - you can use either
of them in arithmetic or string operations with the same semantics and no
warnings. This is a contrast to languages like Python where you have a visible
difference between numeric and string objects. Smart matching might be the first
everyday case where the difference between numbers and strings becomes obvious
to the ordinary Perl programmer.
--
Ed Avis <eda@waniasset.com>
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