javascript - 如何找到与给定数字最匹配的数字

Question

如何为给定的数字找到最合适的数字。
例如。我有一个数字 8 和一个对象数组。

let num = 8;
let data = [
  { fist:  {a: 1, b: 2}, second: {c: 11, d: 12}, number: 1 },
  { fist:  {a: 3, b: 4}, second: {c: 13, d: 14}, number: 7 },
  { fist:  {a: 5, b: 6}, second: {c: 15, d: 16}, number: 10 },
];

每个对象中所有数字中最接近的数字是 7。
如何显示数字 7 所属的整个讣告？

Answer 1

您可以使用 .reduce 从 num 获得最小距离的 obj :

let num = 8;
let data = [
  { fist:  {a: 1, b: 2}, second: {c: 11, d: 12}, number: 1 },
  { fist:  {a: 3, b: 4}, second: {c: 13, d: 14}, number: 7 },
  { fist:  {a: 5, b: 6}, second: {c: 15, d: 16}, number: 10 },
];

const _isEmpty = (obj) => Object.keys(obj).length === 0;

const objWithClosestNumber = data.reduce((acc, item) => {
  if(_isEmpty(acc)) { return item };
  const closestDist = Math.abs(num - acc.number),
    currentDist = Math.abs(num - item.number);
  acc = (currentDist < closestDist) ? item : acc;
  return acc;
}, {});

console.log(objWithClosestNumber);