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31 lines
760 B
Lua
31 lines
760 B
Lua
local Observable = require "rx.observable"
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local util = require "rx.util"
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--- Returns a new Observable that only produces the last result of the original.
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-- @returns {Observable}
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function Observable:last()
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return Observable.create(function(observer)
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local value
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local empty = true
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local function onNext(...)
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value = {...}
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empty = false
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end
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local function onError(e)
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return observer:onError(e)
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end
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local function onCompleted()
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if not empty then
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observer:onNext(util.unpack(value or {}))
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end
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return observer:onCompleted()
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end
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return self:subscribe(onNext, onError, onCompleted)
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end)
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end
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