javascript - 无法读取未定义的属性 'score'

Question

我知道还有很多其他类似的问题与该领域有关，但没有一个答案有效。就我而言，我有以下代码，我试图按分数降序对记录数组进行排序。

function score(string, pattern){
  string = string.toLowerCase();
  pattern = pattern.toLowerCase();

  var position = 0;
  var count = 0;
  while (true) {
    var index = string.indexOf(pattern, position);
    if (index == -1) break;
    count++;
    position = index + 1;
  }
  return(count);
}

function urlScores(web, pattern){
  var records = {};
  var results = [];
  var n = 0;
  for(var i = 0; i < web.length; i++){
    n = score(web[i].content, pattern);
    if(n != 0){
      records.url = web[i].url;
      records.score = n;
      results[results.length] = {url: records.url, score: records.score};
    }
  }
  return(JSON.stringify(results));
}

function rankedScores(web, pattern){
  results = JSON.parse(urlScores(web, pattern));
  var temp = 0;
  var tempUrl = '';
  while(counter < results.length){
    for(var i in results){
      numbers[numbers.length] = results[i].score;
      if(results[i].score < results[i + 1].score){
        temp = results[i].score;
        tempUrl = results[i].url;
        results[i] = {url: results[i+1].url, score: results[i+1].score};
        results[i + 1] = {url: tempUrl, score: temp};
      }
    }
    counter++;
  }
  alert(JSON.stringify(results));
}

最后一个函数给我带来了问题。如果用户运行以下命令:

var web = [ {url : "www.southampton.ac.uk", content : "Southampton University offers degree programmes and world class research test." } , {url : "www.xyz.ac.uk", content : "An alternative University test test test" } , {url : "www", content : "Yet another University test" } ];

rankedScores(web, 'test');

它应该输出相同的数组，但按降序排列。相反，我得到了无法读取未定义的属性“分数”。任何人都可以看到我哪里出了问题吗？
谢谢
另外，我们不允许使用 .sort()!

Answer 1

function rankedScores(web, pattern){
  var results = JSON.parse(urlScores(web, pattern));
  var temp = 0;
  var tempUrl = '';
  var counter = 0;
  var numbers = [], i, len = results.length;

  while (counter < results.length){
    for (i = 0; i < len - 1; i++){
      numbers[numbers.length] = results[i].score; /// ???? 

      if (results[i].score < results[i + 1].score){
        temp    = results[i].score;
        tempUrl = results[i].url;

        results[i]     = {url: results[i+1].url, score: results[i + 1].score};
        results[i + 1] = {url: tempUrl, score: temp};
      }
    }

    counter++;
  }

  alert(JSON.stringify(results));
}