how to pipe pwd into pushd

Question

How can I pipe in the output of pwd to pushd so that I can use pushd on the current directory. I've tried

pwd | pushd

and lots of other combinations but nothing seems to work.

Answer 1

Just use:

pushd $PWD

($PWD is maintained automatically by your shell.)

Or, if you really want an external pwd:

pushd $(/bin/pwd)

Answer 2

pushd .

also works