def _contains(value: Any, comparer=None) -> Callable[[Observable], Observable]:
comparer_ = comparer or default_comparer
filtering = ops.filter(lambda v: comparer_(v, value))
something = ops.some()
return pipe(filtering, something)
def _is_empty() -> Callable[[Observable], Observable]:
"""Determines whether an observable sequence is empty.
Returns:
An observable sequence containing a single element
determining whether the source sequence is empty.
"""
return pipe(ops.some(), ops.map(lambda b: not b))
def _all(predicate: Predicate) -> Callable[[Observable], Observable]:
filtering = ops.filter(lambda v: not predicate(v))
mapping = ops.map(lambda b: not b)
some = ops.some()
return pipe(
filtering,
some,
mapping
)
def create():
return xs.pipe(ops.some(lambda x: x > 0))
def create():
return xs.pipe(ops.some())
def create():
return xs.pipe(ops.some(lambda x: x > 0))
def create():
return xs.pipe(ops.some())
