tee()

[Paul Sandoz]

On Jan 25, 2013, at 2:11 AM, Doug Lea <dl at cs.oswego.edu> wrote:

> On 01/24/13 20:00, Joe Bowbeer wrote:
>> I'm OK with peek() even though it has other meanings on IO streams.
>> 
>> Is the name leak() is more to your liking?
> 
> I can't think of a good name for the the little idiom of
>  ....map(x -> { use(x); return x; })...
> 

Although map affects the properties downstream in ways that tee/peek (observe?) does not. 

If the upstream is known to be sorted and/or distinct then the map operation will clear those properties so the downstream is not known to be sorted and/or distinct.

Paul.