El Jul 19, 2007, a las 12:19 AM, Joseph L. Casale escribió:
Interesting,
I see from your regexp you use a \A and \z, from Perldoc this means:
\A Match only at beginning of string
\z Match only at end of string
I am not sure I understand this requirement?
^ and $ depend on flags, and $ allows an optional trailing newline.
When I want to match a complete string exactly, I tend to use \A and
\z because they convey that intention clearly.
If your code processes line by line and splits on whitespace, \A ...
\z is equivalent to ^ ... $.
In my case, I am checking an array of 3 scalars. Does this make sense:
next unless @data =~ /$RE {num}{real}/;
Does the regexp know to evaluate each element in the array
implicitly? Or do I need to tell it this?
Detecting whether something holds in an array is the job of grep:
my $numbers = grep /\A$RE{num}{real}\z/, @data;
next unless $numbers == @data;
-- fxn
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