Puppet sort hash

age_sorted_names.pp

$data = [
  {'name'=> 'emily', 'age'=> 6},
  {'name'=> 'john', 'age'=> 5},
  {'name'=> 'jade', 'age'=> 4},
  {'name'=> 'grant', 'age'=> 2},
]

function age_sorted_names($ar) >> Array {
  $ar.map |$idx, $entry| {
    [$entry['age'], $entry['name']]
  }.sort.map|$idx, $entry|{
    $entry[1]
  }
}

age_sorted_names($data).notice

output.markdown

$ puppet apply test.pp 
Notice: Scope(Class[main]): [grant, jade, john, emily]
Notice: Compiled catalog for alt01836.csnzoo.com in environment production in 0.03 seconds
Notice: Applied catalog in 0.01 seconds