records: @[
    #[country: "UK", city: "London"]
    #[country: "US", city: "New York"]
    #[country: "US", city: "Birmingham"]
    #[country: "UK", city: "Birmingham"]
]

print "Original order:"
loop records => print

print "\nSorted by country name:"
loop sort.by:'country records => print

print "\nSorted by city name:"
loop sort.by:'city records => print