ENV arrays merge

merge_env_arrays.pp

function test::merge_env_arrays (
  Array $array_one,
  Array $array_two,
) >> Array {

  $hash_one = $array_one.reduce({}) |$memo, $var| {
    $v = $var.split('=')
    merge($memo, { $v[0] => $v[1] })
  }

  $hash_two = $array_two.reduce({}) |$memo, $var| {
    $v = $var.split('=')
    merge($memo, { $v[0] => $v[1] })
  }

  $merged_hashes = merge($hash_one, $hash_two)
  $merged_hashes.map |$item| { "${item[0]}=${item[1]}" }

}

shell.sh

[root@puppet2017 /opt/puppetlabs/puppet/modules]# puppet apply -e 'notice(test::merge_env_arrays(["1=a", "2=b"], ["1=x", "2=y", "3=z"]))'
Notice: Scope(Class[main]): [1=x, 2=y, 3=z]
Notice: Compiled catalog for puppet2017.3.0.puppetlabs.vm in environment production in 0.04 seconds
Notice: Applied catalog in 0.26 seconds