local Observable = require "rx.observable"
local util = require "rx.util"

--- Returns a new Observable that produces the specified values followed by all elements produced by
-- the source Observable.
-- @arg {*...} values - The values to produce before the Observable begins producing values
--                      normally.
-- @returns {Observable}
function Observable:startWith(...)
    local values = util.pack(...)
    return Observable.create(function(observer)
        observer:onNext(util.unpack(values))
        return self:subscribe(observer)
    end)
end