max gap challenge

max-gap.ts

/*

Given an integer array arr, return the maximum difference between two successive elements in arr's sorted form. Return 0 if there's 0 or 1 elements.

*/

function maxGap(numbers: number[]): number {
  if ([0, 1].includes(numbers.length)) {
    return 0;
  }

  const differences = numbers
    .toSorted((a, b) => a - b)
    .map((number, index, array) => array[index + 1] - number)
    .filter(Boolean);

  const maximumDifference = Math.max(...differences);

  return maximumDifference;
}

console.log("maxGap", maxGap([3, 6, 9, 1, 2]));
//3