$legalDays :
$sec :
$min :
$hour :
$day :
$month :
__construct( $raw)
nowMatches()
scheduledAt( $ts = null)
monthMatches( $ts)
dayMatches( $ts)
hourMatches( $ts)
minMatches( $ts)
secMatches( $ts)
parse( $str)
isCond( $s)
isRange( $s)
isCondRange( $s)
isCondVal( $s)
rangeVals( $s)
expandRange( $l, $h = '')
dayValue( $s)
isDigit( $s)
isAlpha( $s)
isLegalDay( $s)
generallyDecentSyntax( $s)