G'day PopeFelix,

for my $index (0..$#params) {
  next if $index % 2 == 0;
  my $parameter = $params[$index];
  my $spec = $params[$index + 1];
  # do something from here...
}
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Is there a more elegant way of doing that?

How about:

for (grep { not $_ % 2 } 0 .. $#params) {
    my ($parameter, $spec) = @params[$_, $_+1];
    ...
}
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[ You've got a couple of typos: the 1st $spec becomes $thing; you assign an arrayref to @params ]