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firestar5683
37 lines
817 B
Python
37 lines
817 B
Python
from typing import Callable, TypeVar
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from reactivex import Observable
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from reactivex import operators as ops
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_T = TypeVar("_T")
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def do_while_(
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condition: Callable[[Observable[_T]], bool]
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) -> Callable[[Observable[_T]], Observable[_T]]:
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"""Repeats source as long as condition holds emulating a do while
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loop.
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Args:
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condition: The condition which determines if the source will be
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repeated.
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Returns:
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An observable sequence which is repeated as long
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as the condition holds.
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"""
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def do_while(source: Observable[_T]) -> Observable[_T]:
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return source.pipe(
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ops.concat(
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source.pipe(
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ops.while_do(condition),
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),
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)
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)
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return do_while
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__all__ = ["do_while_"]
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