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how to match figure and chapter no?

by virudinesh (Acolyte)
on May 06, 2013 at 10:03 UTC ( #1032226=perlquestion: print w/ replies, xml ) Need Help??
virudinesh has asked for the wisdom of the Perl Monks concerning the following question:

<code> input s: $a='figure1 vdfsvh figure3 vdsvjjh'; $b='chapter 3 svbjjvfh chapter5'; need output is a href="chapter 3.html#figure 3>figure 3

Comment on how to match figure and chapter no?
Re: how to match figure and chapter no?
by hdb (Parson) on May 06, 2013 at 10:17 UTC

    Assuming you want output only if there is a matching chapter and figure number:

    use strict; use warnings; # avoid using $a and $b my $f='figure1 vdfsvh figure3 vdsvjjh'; my $ch='chapter 3 svbjjvfh chapter5'; my @figs = $f =~ /figure\s*(\d+)/g; my %chaps; $chaps{$_}++ for ( $ch =~ /chapter\s*(\d+)/g ); for my $i (@figs) { print "href=\"chapter $i.html#figure $i\">figure $i\n" if exis +ts $chaps{$i}; }
Re: how to match figure and chapter no?
by Anonymous Monk on May 06, 2013 at 10:24 UTC

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