Question

我有以下型号：

Specs

trait Specs { def name: String } case class SportsCarSpecs(name: String, details: Details) extends Specs是一种特质，具有以下具体类型：

@dom
  def buildTable(): Binding[BindingSeq[Node]] = {
    val data = Vars.empty[CarBinding]
    /* Initial population. */
    // Some code...
      <br/>
        <table class="table table-bordered table-hover">
          <thead>
            <tr>
              <th class="col-md-1">
                <small>Owner ID</small>
              </th>
              <th class="col-md-1">
                <small>Specs</small>
              </th>
            </tr>
          </thead>
          <tbody>
            {for (entry <- data) yield {
            <tr>
              <td>
                <small>
                  {entry.ownerId.bind}
                </small>
              </td>
              <td>
                <small>
                  {entry.specs.bind match {
                  case Some(SportsCarSpecs(name, details)) => {name} <span>{details.ps}</span>
                  case _ => -
                }}
                </small>
              </td>
            </tr>
          }}
          </tbody>
        </table>
      </div>
  }

在我的Scala.js应用程序中，我现在想要创建一个表并列出所有条目：

 ';' expected but $XMLSTART$< found.
[error]                   case Some(SportsCarSpecs(name, details)) => {name} <span>{details.ps}</span>

但是，我收到以下错误：

let enabled = false;

class List {
    constructor (...args) {
        this.args = args;
    }
    get Count() {
        if (enabled) {
            let _this = this;

            return () => _this.args.length;            
        }
        
        return this.args.length;
    }
}

let list = new List('a', true, null);

// 'Count' is not a method/function by default
console.log(list.Count); // 3

// do something to enable this flag:
enabled = true;

// 'Count' is a method now
console.log(list.Count()); // 3

我做错了什么？

Answer 1

此：

entry.specs.bind match {
  case Some(SportsCarSpecs(name, details)) => {name} <span>{details.ps}</span>
  case _ => -
}

不是有效的表达式，因此您无法在XML文本中插入它。如果你在两个分支中都有完整的XML表达式，它应该可以工作。因此，我能看到的最简单的解决方法是将<small>拉入内部：

          <td>
            {entry.specs.bind match {
              case Some(SportsCarSpecs(name, details)) => <small>{name} <span>{details.ps}</span></small>
              case _ => <small>-</small>
            }}
          </td>

如何在Binding.scala中使用模式匹配？

1 个答案: