josh803316 has asked for the wisdom of the Perl Monks concerning the following question:

This should be an easy answer but I couldn't find it in the template toolkit docs. How can I check the variable type inside a template? What is the equivalent ref function or is there one? How is the following usually checked? 
[% IF ref(variable) eq 'HASH' %]
   [% FOREACH pair in variable.pairs %]
   KEY: [% pair.key %] VALUE: [% pair.value %] 
   [% END %]
[% ELSIF ref(variable) eq 'ARRAY' %]
   [% FOREACH item in variable %]
   ITEM: [% item %]
   [% END %]
[% ELSE %]
   [% variable %]
[% END %]

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Re: Checking the ref value inside a tt2 template
by Anonymous Monk on Dec 18, 2010 at 04:46 UTC
    See Template::Manual::VMethods, and create a custom virtual method called , isa, and use it like 
    [% IF variable.isa('HASH') %]
   [% FOREACH pair in variable.pairs %]
   KEY: [% pair.key %] VALUE: [% pair.value %] 
   [% END %]
[% ELSIF variable.isa('ARRAY') %]
   [% FOREACH item in variable %]
   ITEM: [% item %]
   [% END %]
[% ELSE %]
   [% variable %]
[% END %]

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[d/l]

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