js list 去重

以下是两种JavaScript去重的方法：

1. 使用Set数据结构

var list = [1, 2, 1, {name: 1}, {name: 1}, 'Shaoyouqing', 'Shaoyouqing', null, null, NaN, 0, 0, {}, '', '', [1, 2], [1, 2], undefined, false, false, true, NaN, true, NaN, 9, undefined, 'true', 'false', 'true'];
var uniqueList = Array.from(new Set(list));
console.log(uniqueList);

2. 使用双重循环和splice方法

var list = [1, 2, 1, {name: 1}, {name: 1}, 'Shaoyouqing', 'Shaoyouqing', null, null, NaN, 0, 0, {}, '', '', [1, 2], [1, 2], undefined, false, false, true, NaN, true, NaN, 9, undefined, 'true', 'false', 'true'];
for (var i = 0; i < list.length; i++) {
  for (var j = i + 1; j < list.length; j++) {
    if (list[i] === list[j]) {
      list.splice(j, 1);
      j--;
    }
  }
}
console.log(list);