join is handy for this sort of thing. 
#! /usr/bin/perl

use strict;
use warnings;

my %hash = (
  'description' => '$description',
  'new-role-name' => '$new-role-name',
  'role-name' => '$role-name',
);

my $param = join(q{, }, map{qq{$_ => $hash{$_}}} keys %hash);

print $param;

[download]
role-name => $role-name, new-role-name => $new-role-name, description 
+=> $description

[download]

In reply to Re: Transform hash elements into a string by wfsp
in thread Transform hash elements into a string by perlpal

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