[Help-bash] Fastest way to join an array into a string

[Peng Yu]

Hi,

I'd like to do something similar to str.join() in python.

Suppose the array is in $@, I currently use the following code to
print the joined result ($separator contains the separator to join the
string). Is it the fastest way to do so in bash? Thanks.

            echo -n "$1"
            shift
            if (($#)); then
                declare x
                printf "${separator//%/%%}%s" "$@"
            fi

-- 
Regards,
Peng