Simple demonstration of higher order functions in python

higherorder.py

#!/usr/bin/python
from operator import add

lijst = range(50)
print "lijst:", lijst

f = lambda x: x * 2
print "map:", map(f, lijst)

g = lambda x: x % 2 == 0
print "filter:", filter(g, lijst)

print "reduce:", reduce(add, lijst)

print "list comprehension:", [ f(x) for x in lijst if g(x) ]