39 lines
1.4 KiB
GDScript3
39 lines
1.4 KiB
GDScript3
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## Determines whether an observable collection contains values.
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## [br]
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## [b]Example:[/b]
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## [codeblock]
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## 1 - var res = GDRx.obs.if_then(condition, obs1)
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## 2 - var res = GDRx.obs.if_then(condition, obs1, obs2)
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## [/codeblock]
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## [br]
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## [b]Args:[/b]
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## [br]
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## [code]condition[/code] The condition which determines if the then_source or
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## else_source will be run.
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## [br]
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## [code]then_source[/code] The observable sequence or Promise that
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## will be run if the condition function returns true.
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## [br]
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## [code]else_source[/code] [Optional] The observable sequence or
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## Promise that will be run if the condition function returns
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## False. If this is not provided, it defaults to
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## [code]GDRx.obs.empty()[/code]
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## [br][br]
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## [b]Returns:[/b]
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## [br]
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## An observable sequence which is either the [code]then_source[/code] or
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## [code]else_source[/code].
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static func if_then_(
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condition : Callable = GDRx.basic.default_condition,
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then_source : Observable = null,
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else_source : Observable = null
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) -> Observable:
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var then_source_ = then_source if then_source != null else GDRx.obs.empty()
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var else_source_ = else_source if else_source != null else GDRx.obs.empty()
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var factory = func(__ : SchedulerBase) -> Observable:
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return then_source_ if condition.call() else else_source_
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return GDRx.obs.defer(factory)
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