递归地反转数组中的元素 [英] Recursively Reverse the Elements in an Array

问题描述

我想在javascript中编写一个递归函数，该函数返回一个数组，其元素反转.这段代码会产生以下错误:

I want to write a recursive function in javascript that returns an array with its elements reversed. This code generates the following error:

未定义不是函数

function reverseArray (toBeReversed){
  var reversed = [];

  function reverser (toBeReversed){
    if (toBeReversed.length == 1)
      reversed.push(toBeReversed[0]);
    else {
      reversed.push(toBeReversed.lastOfIndex(0)); //error on this line
      reverser(toBeReversed.slice(-1));
    }
  }

  reverser(toBeReversed);
  return reversed;
}

推荐答案

lastOfIndex不是一个函数，您可能希望使用lastIndexOf.这是类似的方法:

lastOfIndex is not a function, you probably mean to use lastIndexOf. here is a similar way:

function reverseArray (toBeReversed){
  var reversed = [];

  function reverser (toBeReversed){
    if (toBeReversed.length !== 0){
      reversed.push( toBeReversed.pop() );
      reverser( toBeReversed );
    }
  }

  reverser(toBeReversed);
  return reversed;
}

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