On 7/18/07, Joseph L. Casale <[EMAIL PROTECTED]> wrote:
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
Is "foo10bar" valid? /^$RE{num}{real}$/ says no, but /$RE{num}{real}/
says yes. \A and \z are similar to ^ and $, but are not effected by
the m and s flags (which is not an issue in your case since you are
splitting on whitespace).
I am not sure I understand this requirement?
In my case, I am checking an array of 3 scalars. Does this make sense:
next unless @data =~ /$RE {num}{real}/;
Does the regexp know to evaluate each element in the array implicitly?
Or do I need to tell it this?
Not in Perl 5 (Perl 6 will have the smart match operator ~~). If you
want to bail if any of the values in @data are not numbers then you
should say
next if grep { not /^$RE{num}{real}$/ } @data;
Or if you want to reduce @data to just the numbers
next unless my @num = grep { /^$RE{num}{real}$/ } @data;
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