binary operator expected error when checking if a file with full pathname exists

Question

pathname=$(cat $HOME/.rm.cfg)
if [ ! -z $pathname/$1 ]

.rm.cfg is a file that contains the following directory

Answer 1

I had faced same error binary operator expected where I am getting more then one word for some variable.when I used it as mention below.

if [ ! -z ${variable} ];

So for resolve this error I changed it to :

if [[ ! -z ${variable} ]];