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@ -4,38 +4,54 @@ import "fmt" |
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const ( |
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testVersion = 3 |
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minutesPerHour = 60 |
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hoursPerDay = 24 |
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minutesPerHour = 60 |
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minutesPerDay = 1440 |
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) |
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// A Clock stores a minute value representing a time of day.
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type Clock struct { |
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hour int |
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minutes int |
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} |
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func New(hour, minute int) Clock { |
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h, m := adjustTime(hour, minute) |
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return Clock{h, m} |
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} |
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// String returns an hour:minute representation of the Clock.
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func (c Clock) String() string { |
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return fmt.Sprintf("%02d:%02d", c.hour, c.minutes) |
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return fmt.Sprintf("%02d:%02d", c.hour(), c.mins()) |
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} |
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// Add returns a Clock adjusted by the number of minutes specified.
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func (c Clock) Add(minutes int) Clock { |
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min := c.minutes + minutes |
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c.hour, c.minutes = adjustTime(c.hour, min) |
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c.minutes = parseTime(0, c.minutes+minutes) |
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return c |
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} |
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func adjustTime(h, m int) (int, int) { |
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h = (h + (m / minutesPerHour)) % hoursPerDay |
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if h < 0 { |
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h += hoursPerDay |
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// hour computes the hourly portion of the Clock.
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func (c Clock) hour() int { |
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return c.minutes / minutesPerHour |
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} |
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m = m % minutesPerHour |
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if m < 0 { |
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m += minutesPerHour |
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// mins computes the non-hourly remainder of the Clock.
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func (c Clock) mins() int { |
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return c.minutes % minutesPerHour |
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} |
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// New returns a Clock constructed from the given hour and minute values.
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func New(hour, minutes int) Clock { |
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return Clock{parseTime(hour, minutes)} |
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} |
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// parseTime computes the number of minutes that represent the time.
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func parseTime(hour, minutes int) int { |
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// normalize hours that are out of range [0-23]
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hour = hour % hoursPerDay |
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// normalize any out of range values [0-1439]
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minutes = minutes % minutesPerDay |
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// compute the total minutes
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total := hour * minutesPerHour |
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total += minutes |
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// normalize any negative minute values
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if total < 0 { |
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total += minutesPerDay |
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} |
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return h, m |
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return total |
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} |