42 lines
1015 B
GDScript
42 lines
1015 B
GDScript
static func take_(count : int) -> Callable:
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if count < 0:
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ArgumentOutOfRangeError.raise()
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count = 0
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var take = func(source : Observable) -> Observable:
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# """Returns a specified number of contiguous elements from the start of
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# an observable sequence.
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#
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# >>> take.call(source)
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#
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# Keyword arguments:
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# count -- The number of elements to return.
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#
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# Returns an observable sequence that contains the specified number of
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# elements from the start of the input sequence.
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# """
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if count == 0:
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return GDRx.obs.empty()
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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 remaining = RefValue.Set(count)
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var on_next = func(value):
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if remaining.v > 0:
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remaining.v -= 1
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observer.on_next(value)
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if not bool(remaining.v):
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observer.on_completed()
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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 take
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