"interact" behaves oddly if used interactively

[Christian Maeder]

>>>Can actually someone supply an implementation of something like interact 
>>>that does no pipelining for the argument "id"? Simply doing "putStr !$ f 
>>>!$ s" was not enough!
>>
>>Yes, of course.
>>
>>Your code above only forces the evaluation of the first cons-cell of
>>the list, which is not enough.  You want to force the entire list.

Right, thanks to everybody who provided solutions!

Christian