Exercism - Space Age (With.Kotlin)

[문제]

Given an age in seconds, calculate how old someone would be on:

• Earth: orbital period 365.25 Earth days, or 31557600 seconds
• Mercury: orbital period 0.2408467 Earth years
• Venus: orbital period 0.61519726 Earth years
• Mars: orbital period 1.8808158 Earth years
• Jupiter: orbital period 11.862615 Earth years
• Saturn: orbital period 29.447498 Earth years
• Uranus: orbital period 84.016846 Earth years
• Neptune: orbital period 164.79132 Earth years

So if you were told someone were 1,000,000,000 seconds old, you should be able to say that they're 31.69 Earth-years old.

If you're wondering why Pluto didn't make the cut, go watch this youtube video.

 

[Solution1]

class SpaceAge(age: Long) {
    constructor(age: Int) : this(age = age.toLong())

    private val earthSeconds = age.toDouble() / 31557600.toDouble()

    fun onEarth(): Double = formatDouble(earthSeconds)

    fun onMercury(): Double = formatDouble(earthSeconds / 0.2408467)

    fun onVenus(): Double = formatDouble(earthSeconds / 0.61519726)

    fun onMars(): Double = formatDouble(earthSeconds / 1.8808158)

    fun onJupiter(): Double = formatDouble(earthSeconds / 11.862615)

    fun onSaturn(): Double = formatDouble(earthSeconds / 29.447498)

    fun onUranus(): Double = formatDouble(earthSeconds / 84.016846)

    fun onNeptune(): Double = formatDouble(earthSeconds / 164.79132)

    private fun formatDouble(double: Double): Double = String.format("%.2f", double).toDouble()
}