enumerated_casemap

enumerated_casemap.py

def enumerated_casemap(case_handlers, things):
    i = 0
    for x in things:
        for p, f in case_handlers:
            if p(x):
                yield f(i, x)
                i += 1
                break

def main():
	"""
	example output:

	['foo', 'fuzz_1_barr', 'foo', 'fuzz_3_barr', 'fuzz_4_barr', 'foo']
	"""
    foo = 'foo'
    barr = 'barr'
    bazz = 'bazz'

    is_foo = lambda x : x == 'foo'
    is_barr = lambda x : x == 'barr'

    things = [foo, barr, bazz, bazz, foo, barr, barr, bazz, foo]

    resulting_things = enumerated_casemap([
        (is_foo, lambda i, foo : foo),
        (is_barr, lambda i, x : 'fuzz_%d_%s' % (i, str(x))),
    ], things)

    print list(resulting_things)


if __name__ == '__main__':
    main()