cd to (or operate on) a file across parallel directories

cd () { cdop=""; while [ "$1" != "${1#-}" ]; do cdop="${cdop} ${1}"; shift; done; if [ $# -eq 2 ]; then newdir="${PWD/$1/$2}"; [ -d "${newdir}" ] || { echo "no ${newdir}"; return 1; }; builtin cd $cdop "${newdir}"; else builtin cd $cdop "$@"; fi }
ksh's version of cd has an optional syntax where you can type "cd old new" and it will replace "old" with "new" in your current directory and take you there. This is very handy when you have a parallel directory structure, like source and object directories. As suggested, you can just type cd ${PWD/old/new} to get this in bash, but this function in your .bashrc will let you type the ksh cd syntax and avoid typing the special characters while preserving other cd functionality.
Sample Output
splante@guinness:/tmp/src/x/y/z/> cd src obj
splante@guinness:/tmp/obj/x/y/z/> cd obj src
splante@guinness:/tmp/src/x/y/z/> 

0
By: splante
2011-04-07 14:36:26

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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