if [ ! -f ~/.dirs ]; then
	touch ~/.dirs
fi

alias show='cat ~/.dirs'
save (){
	command sed "/!$/d" ~/.dirs > ~/.dirs1; \mv ~/.dirs1 ~/.dirs; echo "$@"=\"`pwd`\" >> ~/.dirs; source ~/.dirs ; 
}
source ~/.dirs  # Initialization for the above 'save' facility: source the .dirs file
shopt -s cdable_vars # set the bash option so that no '$' is required when using the above facility