如何从angular 6中的数组中获取上一个最接近的数字

function getClosestNumber(array: number[], target: number): number {
  // 此处编写代码
}

function getClosestNumber(array: number[], target: number): number {
  let closest = array[0];
  // 此处编写代码
}

function getClosestNumber(array: number[], target: number): number {
  let closest = array[0];
  let diff = Math.abs(closest - target);

  for (let i = 1; i < array.length; i++) {
    let currentDiff = Math.abs(array[i] - target);

    if (currentDiff < diff) {
      diff = currentDiff;
      closest = array[i];
    }
  }

  return closest;
}

const numbers = [1, 3, 6, 8, 10];
const target = 7;

const closestNumber = getClosestNumber(numbers, target);
console.log(closestNumber); // 输出：6