Select an element from a collection with a given pattern

# for example

# Find the Ehningen, Germany region
region = compute.locations.select {|loc| loc.location == "EHN"}.first

# Choose the 32-bit Copper image from the list of available instances for this image
instance_type = image.supported_instance_types.select {|img| img.label == 'Copper 32 bit'}.first