Social Synergy

# Function defined outside the class
def f1(self, x, y):
    return min(x, x+y)
 
class C:
    f = f1
    def g(self):
        return 'hello world'
    h = g

# Ruby knows what you
# mean, even if you
# want to do math on
# an entire Array
cities  = %w[ London
              Oslo
              Paris
              Amsterdam
              Berlin ]
visited = %w[Berlin Oslo]
 
puts "I still need " +
     "to visit the " +
     "following cities:",
     cities - visited

<?php