44 lines
1.2 KiB
GDScript3
44 lines
1.2 KiB
GDScript3
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static func skip_last_(count : int) -> Callable:
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var skip_last = func(source : Observable) -> Observable:
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# """Bypasses a specified number of elements at the end of an
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# observable sequence.
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#
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# This operator accumulates a queue with a length enough to store
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# the first `count` elements. As more elements are received,
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# elements are taken from the front of the queue and produced on
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# the result sequence. This causes elements to be delayed.
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#
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# Args:
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# count: Number of elements to bypass at the end of the
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# source sequence.
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#
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# Returns:
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# An observable sequence containing the source sequence
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# elements except for the bypassed ones at the end.
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# """
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var subscribe = func(
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observer : ObserverBase,
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scheduler : SchedulerBase = null
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) -> DisposableBase:
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var q : Array = []
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var on_next = func(value):
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var front = null
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source.lock.lock()
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q.append(value)
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if q.size() > count:
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front = q.pop_front()
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source.lock.unlock()
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if front != null:
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observer.on_next(front)
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return source.subscribe(
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on_next, observer.on_error, observer.on_completed,
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scheduler
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)
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return Observable.new(subscribe)
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return skip_last
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