Explain command

# Lookup shell on explainshell
function explain() {
# Example url: http://explainshell.com/explain/tar?args=xzvf+archive.tar.gz
    URL="http://explainshell.com/explain"
    FIRST=0
    for i; do
        if [ $FIRST -eq 0 ]; then
            URL="${URL}/$i?args="
            FIRST=1
        elif [ $FIRST -eq 1 ]; then
            URL="${URL}${i}+"
        fi
        echo "arg: $i"
    done
    # Remove last +
    URL="${URL%?}"
    #echo "URL is $URL"
    open "$URL"
}