[Codewars] Cat years, Dog years (8 kyu) / JavaScript

https://www.codewars.com/kata/5a6663e9fd56cb5ab800008b

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DESCRIPTION:

Kata Task

I have a cat and a dog.

I got them at the same time as kitten/puppy. That was humanYears years ago.

Return their respective ages now as [humanYears,catYears,dogYears]

NOTES:

• humanYears >= 1
• humanYears are whole numbers only

 

Cat Years

• 15 cat years for first year
• +9 cat years for second year
• +4 cat years for each year after that

 

Dog Years

• 15 dog years for first year
• +9 dog years for second year
• +5 dog years for each year after that

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References

• http://www.catster.com/cats-101/calculate-cat-age-in-cat-years
• http://www.slate.com/articles/news_and_politics/explainer/2009/05/a_dogs_life.html

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코드

var humanYearsCatYearsDogYears = function(humanYears) {
  if(humanYears === 1) return [humanYears, 15, 15];
  if(humanYears === 2) return [humanYears, 24, 24];
  return [humanYears, 24 + (humanYears - 2) * 4, 24 + (humanYears - 2) * 5];
}