es6中包含多个字段的对象数组中的Javascript计数重复

const arr = [
  { name: 'apple', color: 'red' },
  { name: 'banana', color: 'yellow' },
  { name: 'apple', color: 'green' },
  { name: 'banana', color: 'yellow' },
  { name: 'orange', color: 'orange' }
];

const count = arr.reduce((acc, obj) => {
  const key = JSON.stringify(obj); // 将对象转换为字符串作为键
  acc[key] = (acc[key] || 0) + 1; // 计数器加一
  return acc;
}, {});

console.log(count);

{
  '{"name":"apple","color":"red"}': 1,
  '{"name":"banana","color":"yellow"}': 2,
  '{"name":"apple","color":"green"}': 1,
  '{"name":"orange","color":"orange"}': 1
}