js判断数组去重

const array = [1, 2, 2, 3, 4, 4, 5];
const uniqueArray = [...new Set(array)];
console.log(uniqueArray); // 输出: [1, 2, 3, 4, 5]

const array = [1, 2, 2, 3, 4, 4, 5];
const uniqueArray = array.filter((item, index) => array.indexOf(item) === index);
console.log(uniqueArray); // 输出: [1, 2, 3, 4, 5]

const array = [1, 2, 2, 3, 4, 4, 5];
const uniqueArray = array.reduce((acc, item) => {
  if (!acc.includes(item)) {
    acc.push(item);
  }
  return acc;
}, []);
console.log(uniqueArray); // 输出: [1, 2, 3, 4, 5]

const array = [1, 2, 2, 3, 4, 4, 5];
const map = new Map();
const uniqueArray = array.filter(item => !map.has(item) && map.set(item, 1));
console.log(uniqueArray); // 输出: [1, 2, 3, 4, 5]

const array = [
  { id: 1, name: 'Alice' },
  { id: 2, name: 'Bob' },
  { id: 1, name: 'Alice' }
];
const map = new Map();
const uniqueArray = array.filter(item => !map.has(item.id) && map.set(item.id, 1));
console.log(uniqueArray); // 输出: [{ id: 1, name: 'Alice' }, { id: 2, name: 'Bob' }]