in reply to curried-up moose

I'm a little confused by:

$body = $body->legs( size=>42 )->eyes( color => blue);
I mean, why do the legs make the eyes, knowhutimean?

for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";

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Re^2: curried-up moose
by Limbic~Region (Chancellor) on Jan 21, 2009 at 19:59 UTC
    There is heated debate regarding chained methods as well as a method returning a reference to the object (good idea or not) but it works like this (traditional perl OO):
    sub legs { my ($self, $attribute, $val) = @_; $self->{legs}{$attribute} = $val; return $self; } sub eyes { my ($self, $attribute, $val) = @_; $self->{eyes}{$attribute} = $val; return $self; }

    In other words, the method returns the object so you can then invoke another method on the return value and then assign the return value of that chained method back to the original scalar holding a reference to the object. I made minor updates to this node soon after submitting as I hadn't seen the original code in the root thread.

    Cheers - L~R

      That is a remarkably clear summary, and you may consider me up to speed, and thankful for the explanation.

      I can see why there is debate over this; it seems vaguely distasteful to me, because it means that the code doesn't match the mental model of the thing it's modeling. On the other hand, the savings in typing must certainly make it attractive to many.

      for(split(" ","tsuJ rehtonA lreP rekcaH")){print reverse . " "}print "\b.\n";