Kata 7 - In the Air Tonight

kata7InTheAirTonight.js

const checkAir = function (samples, threshold) {
  let countDirty = 0;
  for (let quality of samples) {
    quality === "dirty" ? countDirty++ : null;
  }
  let ratio = countDirty / samples.length;
  return (ratio > threshold ? "Polluted" : "Clean");
};

console.log(checkAir(
  ['clean', 'clean', 'dirty', 'clean', 'dirty', 'clean', 'clean', 'dirty', 'clean', 'dirty'],
  0.3
));

console.log(checkAir(
  ['dirty', 'dirty', 'dirty', 'dirty', 'clean'],
  0.25
));

console.log(checkAir(
  ['clean', 'dirty', 'clean', 'dirty', 'clean', 'dirty', 'clean'],
  0.9
))

/*
Expected Output
Polluted
Polluted
Clean
*/