Js普通和对象的数组统计有几个相同项数量

// 普通数组统计
let arr = ['李明', '韩梅梅', '张三', '李明', '李明', '张三', '韩梅梅', '李明', 'Jack', '韩梅梅']
const sum = arr.reduce((acc, cur) => {
  if (!acc[cur]) {
    acc[cur] = 0
  }
  acc[cur]++
  return acc
}, {})
console.log(sum) // {李明: 4, 韩梅梅: 3, 张三: 2, Jack: 1}

// 对象数组统计
let arr1 = [{
  hobby: 'basketball'
}, {
  hobby: 'badminton'
}, {
  hobby: 'basketball'
}, {
  hobby: 'swim'
}, {
  hobby: 'basketball'
}, {
  hobby: 'swim'
}, {
  hobby: 'pingpong'
}]
const sum2 = arr1.reduce((acc, cur) => {
  if (!acc[cur.hobby]) {
    acc[cur.hobby] = 0
  }
  acc[cur.hobby]++
  return acc
}, {})
console.log(sum2) // {basketball: 3, badminton: 1, swim: 2, pingpong: 1}