def take(self, limit: int) -> 'Stream':
def fn(collection):
for index, element in enumerate(collection):
if index >= limit:
break
yield element
self.processor = compose(fn, self.processor)
return self
def sum(self) -> 'Stream':
self.processor = compose(sum, self.processor)
return self
def for_each(self, fn: Callable) -> None:
self.processor = compose(partial(for_each, fn), self.processor)
def find_first(self, fn: Callable) -> 'Stream':
self.processor = compose(partial(reduce, fn), self.processor)
return self
def filter(self, fn: Callable) -> 'Stream':
self.processor = compose(partial(filter, fn), self.processor)
return self
def flat_map(self, fn: Callable) -> 'Stream':
self.processor = compose(partial(iflat_map, fn), self.processor)
return self