we have a map/reduce if certian condtions are met we want to go to the next iteration like continue in JS

Next iteration of what?

thanks

another consideration is you can use map() to decide what does (and does not) make it to a reduce() stage.

yes but since this is more of error handling and only occurs unoften there is no need for adding the overhead for the extra stage

the default behavior for map() is to continue processing in the face of unhandled exceptions.