[Bash] change current workspace by calling a script function

# to change current path using a customized script function # instead of using alias. Need put this function in .bashrc #    e.g., #            mycd ex1 ==> cd ~/scripttest/ex1 #            mycd ex2 ==> cd ~/scripttest/ex2 #            mycd eX2 ==> cd ~/scripttest/ex2 #   @ http://scriptdemo.blogspot.com  function mycd (){  if [ $# -ne 1 ]; then     echo "Usage:"     echo " mycd foldername"  else     targetF=`echo $1 | awk '{print tolower($1)}'`     targetP=${HOME}/scripttest/${targetF}     if [ -d ${targetP} ]; then        eval "cd ${targetP}"     else        echo "${targetP} does not exist!"     fi     unset targetF  fi }