Question

我有以下数组：

{
  quiztitle: "Name the US Presidents",
  presidents: [
        {
          president_name: "George Washington",
          number: "1",
          imgurl: "c-1gw.jpg",
          answer_variations: [
                              "Washington"
                             ]
         },
         {
          president_name: "John Quincy Adams",
          number: "6",
          imgurl: "c-6ja.jpg",
          answer_variations: [
                               "Adams",
                               "John Adams"
                             ]
          }, .... ect

如何访问答案变体数组并将内容与提交的值进行比较？

我目前有这个代码来检查总统：

var answer = $('.presidentRow input').val().toLowerCase();
var correct = false; 
$.each(data.presidents, function(i, president) {
if ( president.number == questionNumber && president.president_name.toLowerCase() === answer) {
                            correct = true;
                            return false;
                        }
                    });

此代码采用问题编号并根据总裁名称检查用户提交的值。如果它是正确的，它将变量设置为true，我可以使用它来生成结果。如何根据变化检查提交的答案？

由于

Answer 1

另一种比较方式你可以试试〜

var answer = $('.presidentRow input').val().toLowerCase();
var correct = false;
$.each(data.presidents, function(i, president) {
    if ( president.number == questionNumber) {
        if(president.president_name.toLowerCase() === answer){
            correct = true;
        }else if((','+ president.answer_variations.join().toLowerCase()+',').indexOf(','+answer+',')!=-1){
            correct = true;
        }
        return false;
    }
});

修改

使用Array.join()制作变体作为昏迷分隔字符串，您可以简单地使用String.indexOf()来检查答案是否存在。

添加','使答案符合正确的变体选项。

Answer 2

创建一个列表以保存名称及其所有变体的小写。使用$.merge创建列表，然后使用$.map将其形成为小写。
如果答案是其中任何一个，答案是正确的。使用$.inArray查找索引，如果索引＆gt; = 0，答案就在列表中，所以它是正确的。

var answer = $('.presidentRow input').val().toLowerCase();
var questionNumber = $('#qNum').val();
var correct = false; 
$.each(data.presidents, function(i, president) {
  if ( president.number == questionNumber) {
    // Put all possible name answers into an array.
    var nameVairations = 
      $.merge([president.president_name], president.answer_variations);

    // .toLowercase all answers
    nameVairations = $.map(nameVairations, function(name) {
      return name.toLowerCase();
    });

    // Check if the answer appears in the list
    if ($.inArray(answer, nameVairations) >= 0) {
      correct = true;
      return false;
    }
  }
});

你也可以用vanilla js数组函数.concat，.map，.indexOf

Answer 3

所以基本上，迭代总统数组，直到我们发现其总统的数量等于问题数。然后根据总统名称测试答案，如果不是...尝试在answer_variations arrray中找到它。

body.setTransform(body.getWorldCenter(), angle - ((float)Math.PI)/2.0f);

我不知道你是怎么得到questionNumber的。

小测试

＆＃13;

var answer = $('.presidentRow input').val().toLowerCase();
var presidents = data.presidents;
var correct = presidents.some(function(president) {
    if (president.number == questionNumber) {
      if (answer == president.president_name.toLowerCase()) {
        return true;
      } else {
        return president.answer_variations.some(function(validAnswer) {
          console.log(validAnswer.toLowerCase());
          if (answer == validAnswer.toLowerCase()) {
            return true;
          }
        });
      }
    }
  });

＆＃13;

var data = {
  quiztitle: "Name the US Presidents",
  presidents: [{
    president_name: "George Washington",
    number: "1",
    imgurl: "c-1gw.jpg",
    answer_variations: [
      "Washington"
    ]
  }, {
    president_name: "John Quincy Adams",
    number: "6",
    imgurl: "c-6ja.jpg",
    answer_variations: [
      "Adams",
      "John Adams"
    ]
  }]
};

function presidentTest(answer, questionNumber) {
  var answer = answer.toLowerCase();
  return data.presidents.some(function(president) {
    if (president.number == questionNumber) {
      if (answer == president.president_name.toLowerCase()) {
        return true;
      } else {
        return president.answer_variations.some(function(validAnswer) {
          console.log(validAnswer.toLowerCase());
          if (answer == validAnswer.toLowerCase()) {
            return true;
          }
        });
      }
    }
  });
}

/**** TEST *****/
document.getElementById('results').innerHTML += '\n' + presidentTest('george Washington', 1);
document.getElementById('results').innerHTML += '\n' + presidentTest('wachington', 1);
document.getElementById('results').innerHTML += '\n' + presidentTest('adams', 6);
document.getElementById('results').innerHTML += '\n' + presidentTest('john adams', 6);

＆＃13;

Answer 4

var answer = answer.toLowerCase().replace(/\s+/," ") // replace multiple spaces by single space and lower the case
var correct = false; 
var president = data.presidents.find(function(president){return president.number == questionNumber;})
if(president){
   var variationsArr = president.answer_variations.concat([president.president_name])
   correct = ("|" + variationsArr.join("|").toLowerCase() + "|").indexOf("|" + answer + "|") > -1; 
}

在jQuery中检查/迭代多维数组

4 个答案: