tmux session switcher function

gistfile1.sh

function sesh() {
    if [[ $# -gt 0 ]]; then
        case "$1" in
            new)
                tmux new -s "$2"
                ;;
            *)
                if tmux list-sessions | grep "attached"; then
                    tmux switch -t "$1"
                else
                    tmux attach -t "$1"
                fi
                ;;
        esac
    else
        (tmux list-sessions &>/dev/null && tmux list-sessions) || echo "No active sessions."
    fi
}