Question

我在React App中使用以下方法将Object转换为字符串。一切正常，但是我想在屏幕上输出结果，而在输出的周围没有""。

  renderConfigInfoCellRow = configInfoKey => {
    const { lconfigInfo } = this.props;
    return (
      <tr key={configInfoKey}>
        <td className="pt-3 text-muted font-weight-bold w-25">{configInfoKey}</td>
        {(typeof lconfigInfo.sql[configInfoKey] === 'string' && (
          <td className="pt-3">{JSON.stringify(lconfigInfo.sql[configInfoKey])}</td>
        )}
      </tr>
    );
  };

我在这里使用它：

<tbody>
  {Object.keys(lconfigInfo.sql).map(configInfoKey =>
    this.renderConfigInfoCellRow(configInfoKey)
  )}
</tbody>

关于如何删除""周围的"output"的任何想法？或者，如果它们是JSON.Stringify的替代方法。谢谢！！

Answer 1

使用JSON.stringify（）没有意义，如果数据不是对象，请尝试更改此JSON.stringify(lconfigInfo.sql[configInfoKey]) 到lconfigInfo.sql[configInfoKey]。

还有一种情况，您需要检查lconfigInfo.sql[configInfoKey]是否为字符串，然后尝试再次将其转换为字符串。

Answer 2

JSON.stringify输出有效的JSON，因此，如果将其传递给字符串，它将返回一个用""包装的字符串。

您正在检查lconfigInfo.sql[configInfoKey]的值是否为字符串，因此可以直接将其打印出来，如：

<td className="pt-3">{lconfigInfo.sql[configInfoKey]}</td>

Answer 3

尝试select cast(event_date AS date) AS date, sum( status = 'Yes' ) as Positive, sum( status <> 'Yes' ) as Negative from events e group by cast(event_date AS date);：

String userName= "Someone";
    String isRanked=  " is ranked at position ";
    String rank= "1";
    String withScore = "  with score of ";
    String score = "154";
    String in = " in ";
    String featureName = "Cooking";
    String finalString= serName+isRanked+rank+withScore+score+in+featureName;

    final SpannableStringBuilder sb = new SpannableStringBuilder(finalString);
    // Span to set text color to some RGB value
    final ForegroundColorSpan fcs = new ForegroundColorSpan(context.getResources().getColor(R.color.bright_blue));
    // Span to make text bold
    final StyleSpan bss = new StyleSpan(android.graphics.Typeface.BOLD);
    // Set the text color for first 4 characters
    int endAt = 0;
    endAt = splited[0].length();
    sb.setSpan(fcs, 0, endAt, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
    // make them also bold
    sb.setSpan(fcs,userName.length()+isRanked.length(),userName.length()+isRanked.length()+rank.length(),Spannable.SPAN_INCLUSIVE_INCLUSIVE);
    sb.setSpan(bss, 0, endAt, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
    infoStmt.setText(sb);

JSON.Stringify |在带有引号的屏幕上输出结果''

3 个答案: