import assert

names = ['John', 'Linda', 'Zelda']
ages = {'John':31, 'Linda':29, 'Zelda':312}

# List
output = ''
names.forEach ^(name) { output += name + '\n' }
assert.equal output, 'John\nLinda\nZelda\n'

# Map
output = {}
ages.forEach ^(name, age) { output[':'+name] = Text age }
assert.deepEqual output, {':John':'31', ':Linda':'29', ':Zelda':'312'}

output = []
ages.forEach ^(name) { output.push ':'+name }
output.sort()  # Since maps aren't guaranteed to retain order
assert.deepEqual output, [':John', ':Linda', ':Zelda']