def zip(self):
'''
smash incoming things into one single thing, pairing things by iterable
position
'''
with self._context():
return self._xtend(zip(*self._iterable))
def pairwise(self):
'''every two incoming things as a tuple'''
with self._context():
i1, i2 = tee(self._iterable)
next(i2, None)
return self._xtend(zip(i1, i2))
