Re: loop through a hash structure without knowing the hash keys?

I want a way to quickly display all the info in a  var - a Dumper output if you will.  But more than that, like in  some other server-side language, you can query the column lists (or  hash keys) and loop through those and use a piece of generic code when  all you intend to do is to display everything in the var.
  
  Imagine yourself wanting to output all the info in a reference to an  array of hashes (which essentially mimics a database table), the HTML  code can really be made the same if a construct is available to loop  through things.
  
  The tight coupling of knowledge between what's being sent from the perl  code and the HTML can be avoided, that's the whole point of the design  of the template module (vs Mason where you mingle Perl code with  display code) right?  It just seems ugly when I have to tell a  designer to go look at the perl file to see what he is getting in the  var.  He should be able to find that out from some sensible  constructs.
  
  - boon

Mathew Robertson <[email protected]> wrote:              It sounds like you need a tool which simply dumps the template  variable names (ie: using the $ht->params() function), rather than  some special mode to H::T
  
  Mathew
  
  Boon Chew wrote:      Ya sorry, that's what I meant.
    
  Right now I am working on some site code, and the designer sometimes  have to come to me for stuff because he doesn't always know what hash  keys I am passing to him (say sometimes I might add a new one,  sometimes he mistype one, etc.).  The whole point of doing this  template separation is to decouple things, but if the designer can only  figure out what's being passed into the template by looking at the  module code, it kinda defeats the whole purpose.
    
  It would be such great convenience to be able to dump the whole thing  on the HTML with a call like this:
    
  <tmpl_var story_loop>
    
  or
    
  <tmpl_loop story_loop>
    <column_var>   <-- outputs all keys here
  </tmpl_loop>
    
    Carl Franks <[email protected]> wrote:      > e.g.
  > 
  > 
  > 
      
  a TMPL_LOOP doesn't take a hash, it takes an array-ref of hash-refs
  that would be
      
  my @loop = (
  {name => 'a'},
  {name => 'b'},
  );
      
  $tmpl->param( students => \@loop );
      
  If you knew that already, give an example of what sort of data you
  want to put in, and what you want the HTML to look like.
      
  Cheers,
  Carl
      
      
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