数组去重

fun(data: Array<any>) {
    const obj: any = {};
    const result = [];
    for (const item of data) {
      if (!obj[item.Id]) {
        result.push(item);
        obj[item.Id] = 1;
      }
    }
    return result;
  }

fun(data) {
    const obj: any = {};
    const result = [];
    for (const item of data) {
      if (!obj[item]) {
        result.push(item);
        obj[item] = 1;
      }
    }
    return result;
  }

fun(a: any[], b: any[]): any[] {
    const arr = a.concat(b);
    const result = [];
    const obj: any = {};

    for (const i of arr) {
      if (!obj[i]) {
        result.push(i);
        obj[i] = 1;
      }
    }

    return result;
  }