To get each of the values of a map:

Use the [map->get] method.  The following code loops through the map displaying each value.

Code

var (colours = map( 'red'='#ff0000', 
    'green'='#00ff00', 
    'blue'='#0000ff') )

 with i in $colours->keys 
     do => {^
          $colours->get(#i)+'\n'
     ^}

Result

#0000ff
#00ff00
#ff0000

---

Calling the method with an unknown key

If you pass a value to [map->get] that is not a key in the map, then a failure will be raised.

Code

var(my_map) = map('moose'='yuk', 'elk'='yum', 'croc'='chicken')

$my_map->get('goose')

Result

-9956 The key was not found