44 lines
1.0 KiB
GDScript3
44 lines
1.0 KiB
GDScript3
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static func element_at_or_default_(
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index : int, has_default : bool = false, default_value = GDRx.util.GetNotSet()
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) -> Callable:
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if index < 0:
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ArgumentOutOfRangeError.new(
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"Argument cannot be lower than zero!").throw()
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index = 0
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var element_at_or_default = func(source : Observable) -> Observable:
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var subscribe = func(
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observer : ObserverBase, scheduler : SchedulerBase = null
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) -> DisposableBase:
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var index_ = RefValue.Set(index)
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var on_next = func(x):
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var found = false
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if true:
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var __ = LockGuard.new(source.lock)
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if index_.v > 0:
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index_.v -= 1
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else:
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found = true
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if found:
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observer.on_next(x)
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observer.on_completed()
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var on_completed = func():
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if not has_default:
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observer.on_error(ArgumentOutOfRangeError.new())
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else:
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observer.on_next(default_value)
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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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return element_at_or_default
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