好的,这就是我想在这里实现的目标。
我有这个我想尝试的板子,
当我将鼠标悬停在<tr>
上时,我想color:#fff
将<a>
提供给<tr>
我内在的tr:hover {color:#fff}
。< / p>
如果我提供
,它就无法运作val updateFunc = (values: Seq[(Double,Double)], state: Option[(Double,Double,Double,Double)]) => {
val values1 = values.map(x => x._1)
val values2 = values.map(x => x._2)
val currentCost = values1.foldLeft(0d)(_+_)
val currentQuantity = values2.foldLeft(0d)(_+_)
val currentTotal = {
if(currentCost != 0d && currentQuantity != 0d)
currentCost * currentQuantity
else
0d
}
val oldTotals = state.getOrElse(0d,0d,0d,0d) //(cost,quantity,total,runningTotal)
val runningTotal = oldTotals._4+currentTotal
values.drop(1)
Some(currentCost,currentQuantity,currentTotal,runningTotal)
}
val dstream: [String,(Double,Double)] = KafkaUtils.createStream(ssc,zkQuorum,group,topicMap)
.window(Seconds(1), Seconds(1))
.map(_._2)
.map(x => (compact(parse(x,false) \\ "Name").toString(),
(compact(parse(x,false) \\ "Cost").replace('$', ' ').replace('\"',' ').trim.toDouble,
compact(parse(x,false) \\ "quantity").toDouble))
)
val result = dstream.updateStateByKey(updateFunc)
result.print()
有没有办法实现这个目标?
我似乎无法找到合适的选择器。
这是我正在http://lifeto.cafe24.com/xe/request工作的网站。
答案 0 :(得分:0)
试试这个,
tr {
background: #eee;
}
tr:hover {
background: #333;
}
tr:hover a {
color: #fff;
}
&#13;
<table>
<tr>
<td><a href="#">Link 1</a>
</td>
<td><a href="#">Link 2</a>
</td>
</tr>
</table>
&#13;