Simply you can use this below code as well in .basrc

function go {
    case $1 in
    (dashboard) cd $HOME/dashboard;;
    (2.8)       cd $HOME/dashboard/2.8;;
    ($1)        cd $HOME/$1;;
    esac;
}
[download]

It will take to your $HOME directory default and from their your path, i meant instead "cd ~/<directories>" :-)