Print current time in various formats

now.sh

function now() {
    case ${1:-_} in
    -h*|--h*) # now --help
        echo usage: now '[date|httpdate|rfc2822|iso8601]' ;;
    d*) # now date
        LC_ALL=C date ;;
    h*) # now httpdate
        ruby -e 'require "time"; puts Time.now.httpdate' ;;
    i*|x*) # now iso8601, now xmlschema
        ruby -e 'require "time"; puts Time.now.iso8601'\(${2:-0}\) ;;
    r*) # now rfc2822, now rfc822
        ruby -e 'require "time"; puts Time.now.rfc2822' ;;
    *) # now
        now d
        now h
        now i
        now r ;;
    esac
}