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XML::Rules - check whether a particular child exists

by Melly (Hermit)
on May 04, 2011 at 13:17 UTC ( #902876=perlquestion: print w/ replies, xml ) Need Help??
Melly has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

Using XML::Rules, how can I make a rule dependant on whether a tag has a particular sub-tag? e.g.

rules => [ FOO => sub{print "here!"} # make this rule dependant on whether FOO +has a child-tag called BAR? ]

Many thanks...

Edit to add - Solved!

rules => [ FOO => sub{ if(exists $_[1]->{'BAR'}){ print "here!"; } } ]

Edit to add - no it's not... :(

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2 -$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20
Tom Melly, pm (at) cursingmaggot (stop) co (stop) uk

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