javascript - 从搜索结果创建记录数组

Question

我一直在帮助一位 friend 改进他的代码以使用搜索结果创建记录，但它并没有创建记录数组，而是只返回最后一个结果。如何获取创建的记录数组？即搜索 in 将创建一条记录:

标题:继承:继承周期，第 4 册分数:2

标题:结束的感觉分数:1

books = [
  {
    title: "Inheritance: Inheritance Cycle, Book 4",
    author: "Christopher Paolini",
  },
  {
    title: "The Sense of an Ending",
    author: "Julian Barnes"
  },
  {
    title: "Snuff Discworld Novel 39",
    author: "Sir Terry Pratchett",
  }
]
search = prompt("Title?");

function count(books, pattern) {
  var result = [];
  var record = {};
  for (i = 0; i < books.length; i++) {
    var index = -1;
    result[i] = 0;
    do {
      index = books[i].title.toLowerCase().indexOf(pattern.toLowerCase(), index + 1);
      if (index >= 0) {
        result[i] = result[i] + 1;
        record.title = books[i].title;
        record.score = result[i];
      }
    } while (index >= 0)
  }
  return record.title + " " + record.score;
}
alert(count(books, search));

Answer 1

你应该返回 result 数组，在循环中构造 record 初始分数为 0，当匹配时递增分数(而不是结果)在内循环中找到，只有当分数不为零时，才将record插入到result数组中:

function count(books, pattern) {
   var result = [];
   for (i = 0; i < books.length; i++) {
     var record = {title: books[i].title, score: 0};
     var index = -1;
     do {
       index = books[i].title.toLowerCase().indexOf(pattern.toLowerCase(), index + 1);
       if (index >= 0) {
         record.score = record.score + 1
       }
    } while (index >= 0)
    if (record.score > 0) {
       result.push(record);
    }    
  }
  return result;
}