57 lines
1.3 KiB
GDScript3
57 lines
1.3 KiB
GDScript3
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static func last_or_default_async(
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source : Observable,
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has_default : bool = false,
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default_value = null
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) -> Observable:
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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 value = [default_value]
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var seen_value = [false]
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var on_next = func(x):
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value[0] = x
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seen_value[0] = true
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var on_completed = func():
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if not seen_value[0] and not has_default:
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observer.on_error(SequenceContainsNoElementsError.new())
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else:
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observer.on_next(value[0])
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observer.on_completed()
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return source.subscribe(
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on_next, observer.on_error, on_completed,
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scheduler
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)
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return Observable.new(subscribe)
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static func last_or_default_(
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default_value = null, predicate = null
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) -> Callable:
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var last_or_default = func(source : Observable) -> Observable:
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# """Return last or default element.
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#
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# Examples:
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# >>> var res = last_or_default.call(source)
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#
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# Args:
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# source: Observable sequence to get the last item from.
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#
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# Returns:
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# Observable sequence containing the last element in the
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# observable sequence.
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# """
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if predicate != null:
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var predicate_ : Callable = predicate
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return source.pipe2(
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GDRx.op.filter(predicate_),
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GDRx.op.last_or_default(default_value)
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)
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return last_or_default_async(source, true, default_value)
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return last_or_default
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