From: spooq <spoooq@...>
Date: 2006-11-17T20:37:24+09:00
Subject: Re: #returning and #tap

I definitely think of it as tapping a phone line.

a.map.map.map.map

eavesdrop = Proc.new { |secret| puts secret }

a.map.map.tap(&eavesdrop) .map.map

It lets me get into the line and hear what's going on without changing
any existing behaviour. Using a proc that modifies secret is not a
good idea, just keep it for things with other types of side-effects.
There's no way to mark the object read-only for the purposes of the
passed-in proc, is there?

I haven't seen anything to change my mind about the other use. It just
seems pointless.