javascript - JS 中第 n 次出现时进行切片/分割

Question

我有一个由“|”分隔的字符串组成的数组:

LOG: 380|2|choice|Question_8_13240_1351170102936|||incorrect|2012-10-25T15:01:13|1|<ln>380|2|choice|Question_10_13280_1351170102995|||incorrect|2012-10-25T15:01:17|1| 

并且需要从每个字符串中获取 Question_8_13240_1351170102936 ，以便我可以查看是否有任何重复的问题，即第三次出现“|”之后的字符串4号之前

构建数组的代码:

 AssessmentManager.prototype.submit = function () {
  assessData = "";
  assessmentItemsLength = this.assessmentItems.length;
  for (i = 0; i < this.assessmentItems.length; i++) {
    if (!this.assessmentItems[i].getSubmitted()) {
      assessmentFlatDataItem = this.assessmentItems[i].getFlatData();
      if (assessmentFlatDataItem.length > 0) {
        if (assessData.length > 0)
          assessData += "<ln>";
          assessData += assessmentFlatDataItem;
        }
      }
    }
  }

然后获取Flatdata:

  AssessmentItem.prototype.getFlatData = function () {
  result = _userScormModuleId + "|";

  if (this._interactionIdx)
    result += this._interactionIdx;
  result += "|";

  if (this._interactionType)
    result += this._interactionType
  result += "|";

  if (this._interactionId)
    result += this._interactionId
  result += "|";

  if (this._learnerResponse)
    result += this._learnerResponse
  result += "|";

  if (this._correctResponse)
    result += this._correctResponse
  result += "|";

  if (this._result)
    result += this._result
  result += "|";

  if (this._timeStamp)
   result += this._timeStamp
  result += "|";

 if (this._weighting)
   result += this._weighting
 result += "|";

 if (this._description)
  result += this._description

  return result;
}

我将如何实现这一目标？谢谢

我现在有这个:

 learnerResponsesArray.push({ 
    key: j,
    value:  this.assessmentItems.split('<ln>')
  });

然后循环遍历 learnerResponsesArray？

Answer 1

var cells = mystring.split("|");
// nth item...
var myitem = cells[n];

但正如 @mori57 所说，为什么使用这种格式而不是 JSON？