JavaScript 功能无效。 indexOf 未定义

Question

function filteredArray(arr, elem) {   let newArr = [];

Loops through every element of the nested array.

for (let i=0;i<arr.length;i++){     
    for (let j=0;j<arr[i].length;j++){

If the value on the iteration is equal to the argument passed, it is supposed to set a variable x to be equal to the value of the nested array during the ongoing iteration

  if (arr[i][j]==elem){ 
    let x = indexOf(arr[i][j]);

It is supposed to remove the element with index equal to the variable x.

    arr[i][j].splice(x,1);

Then it is supposed to push the remained of the nested array to the new array and then subsequently return the new array.

      newArr[i].push(...arr[i][j]);
      }
    }
  }
  console.log(newArr);
  return newArr;
}

但是有一个错误说 'indexOf is not defined'

我不明白为什么它不起作用。 return indexOf 每次迭代都未定义。请看评论。如果您不介意，请分享您对我的代码的看法。

Answer 1

indexOf 是一个 array/string 方法，可以像 array.indexOf(element) 这样的数组调用。在您的情况下，您需要通过 array.

你也可以跳过indexOf因为这里变量i和j会给出父数组和嵌套数组的相关索引

JavaScript 功能无效。 indexOf 未定义

JavaScript function is not working. indexOf is undefined

javascript

arrays

push

splice