一道面试题

题目如下：

实现一个get函数，使得下面的调用可以输出正确的结果

const obj = { selector: { to: { toutiao: "FE Coder"} }, target: [1, 2, { name: 'byted'}]};

get(obj, 'selector.to.toutiao', 'target[0]', 'target[2].name');
// [ 'FE Coder', 1, 'byted']

 

 下边给出我的解答：思路很简单，就是替换字符，然后再切割字符串

function doSomeThing(){
     const obj = { selector: { to: { toutiao: "FE Coder"} }, target: [1, 2, { name: 'byted'}]}
      this.get(obj, 'selector.to.toutiao', 'target[0]', 'target[2].name')
    }
function get(){
      let obj = arguments[0]
      let temp = []
      let res = []
      for(let i=1;i<arguments.length;i++){
        let x = (arguments[i].replace(/\[/g,'.')).replace(/\]/g,'')
        temp.push(x)
      }
      for(let j=0;j<temp.length;j++){
        let arr = temp[j].split('.')
        let result = obj
        for(let k=0;k<arr.length;k++){
          result = result[arr[k]]
        }
        res.push(result)
      }
      console.log(res)
    }