javascript - 反转 JavaScript 中的字符串 : Why is my answer not passing the test?

Question

我在 JavaScript 测试中遇到困难，我的答案没有通过，但我不明白为什么？

问题是:

Write a function that returns the reverse of a given string. Although many languages have a built in function to reverse a string, you should do it manually, building up the output character by character. For example, "Hello" returns "olleH"

这就是我到目前为止所拥有的......

stringReverse = function(input) {
  // Your code goes here
  var inputA = input.split('');
  var inputL = inputA.length;
  var beta = new Array(inputL);
  for (var i=0; i<inputL; i++) {
    var alpha = inputA.pop();
    beta.splice(i,1,alpha);
  }
  var newStr = beta.join('');
  return console.log(newStr);
};

我的输出看起来正确，但它没有通过测试。我收到以下消息:

Started

olleH FA F F Failures: 1) SolutionTests Test1 Message: Expected undefined to equal 'olleH'. Stack: Error: Expected undefined to equal 'olleH'. at Object. (/sandboxes/deer/SolutionSpec.js:7:40) 2) SolutionTests Test2 Message: Expected undefined to equal 'A'. Stack: Error: Expected undefined to equal 'A'. at Object. (/sandboxes/deer/SolutionSpec.js:11:36) 3) SolutionTests Test3 Message: Expected undefined to equal ''. Stack: Error: Expected undefined to equal ''. at Object. (/sandboxes/deer/SolutionSpec.js:15:35) 3 specs, 3 failures Finished in 0.014 seconds

Answer 1

return console.log(newStr);

这将返回未定义值。我认为你的意思是:

return newStr;