OptionalUtils.py


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from typing import Optional, TypeVar, Callable


T = TypeVar('T')
def exists(opt: Optional[T], cond: Callable[[T], bool]) -> bool:
    match opt:
        case None:
            return False
        case _:
            return cond(opt)

def foreach(opt: Optional[T], call: Callable[[T], None]) -> None:
    match opt:
        case None:
            return None
        case _:
            return call(opt)