需要有关使用Javascript搜索对象的帮助

function linearSearch(obj, target) {
  for (let key in obj) {
    if (obj.hasOwnProperty(key) && obj[key] === target) {
      return key; // 返回属性名
    }
  }
  return null; // 未找到返回null
}

function binarySearch(obj, target) {
  const keys = Object.keys(obj).sort();
  let start = 0;
  let end = keys.length - 1;
  
  while (start <= end) {
    const mid = Math.floor((start + end) / 2);
    const midKey = keys[mid];
    const midValue = obj[midKey];
    
    if (midValue === target) {
      return midKey;
    } else if (midValue < target) {
      start = mid + 1;
    } else {
      end = mid - 1;
    }
  }
  
  return null; // 未找到返回null
}

const _ = require('lodash');

function findKey(obj, target) {
  return _.findKey(obj, (value) => value === target);
}