def min_(
comparer: Optional[Comparer[_T]] = None,
) -> Callable[[Observable[_T]], Observable[_T]]:
"""The `min` operator.
Returns the minimum element in an observable sequence according to
the optional comparer else a default greater than less than check.
Examples:
>>> res = source.min()
>>> res = source.min(lambda x, y: x.value - y.value)
Args:
comparer: [Optional] Comparer used to compare elements.
Returns:
An observable sequence containing a single element
with the minimum element in the source sequence.
"""
return compose(
ops.min_by(identity, comparer),
ops.map(first_only),
)
def create():
return xs.pipe(ops.min_by(lambda x: x["key"]))
def create():
return xs.pipe(ops.min_by(lambda x: x["key"], reverse_comparer))
def create():
return xs.pipe(ops.min_by(lambda x: _raise(ex), reverse_comparer))