turtles-on2.0

turtles-on agent turtles-on agentset <breeds>-on agent <breeds>-on agentset

Reports an agentset containing all the turtles that are on the given patch or patches, or standing on the same patch as the given turtle or turtles.

ask turtles [
  if not any? turtles-on patch-ahead 1
    [ fd 1 ]
]
ask turtles [
  if not any? turtles-on neighbors [
    die-of-loneliness
  ]
]

If the name of a breed is substituted for "turtles", then only turtles of that breed are included.