数组合并

 一:合并后的数组为:['A1','A2','A',B1','B2','B','C1','C2','C','D1','D2','D']
    let ary1 = ['A1', 'A2', 'B1', 'B2', 'C1', 'C2', 'D1', 'D2'];
    let ary2 = ['A', 'B', 'C', 'D'];
 
    ary2 = ary2.map(item => item + '3');
    let arr = ary1.concat(ary2);
    arr = arr.sort((a, b) => a.localeCompare(b)).map(item => {
      return item.replace('3', '');
    })

 

二:合并后的数组为:['D1','D2','D','A1','A2','A','C1','C2','C','B1','B2','B']
    let ary1 = ['D1', 'D2', 'A1', 'A2', 'C1', 'C2', 'B1', 'B2'];
    let ary2 = ['B', 'A', 'D', 'C'];

    let n = 0;
    for (let i = 0; i < ary2.length; i++) {
      let item2 = ary2[i];
      for (let k = 0; k < ary1.length; k++) {
        let item1 = ary1[k];
        if (item1.includes(item2)) {
          // => 如果包含就记录一下当前这一项的索引位置(后面还有包含的会重新记录这个值)
          n = k;
        }
      }
      // => 把当前 item2 这一项插入到 ary1 中 n 的后面
       ary1.splice(n + 1, 0, item2);
     }

    console.log(ary1)

 

posted @ 2020-04-02 17:10  YuTing-721  阅读(136)  评论(0编辑  收藏  举报