Abou Haydar Elias created ZEPPELIN-747:
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Summary: Companion object in Scala isn't associating itself with
case class
Key: ZEPPELIN-747
URL: https://issues.apache.org/jira/browse/ZEPPELIN-747
Project: Zeppelin
Issue Type: Improvement
Reporter: Abou Haydar Elias
Companion object in Scala isn't associating itself with case class and :paste
mode isn't available to remedy to this problem.
The following code will generate the error concerning companion object
association with it's case class.
{code}
import org.apache.spark.util.StatCounter
class NAStatCounter extends Serializable {
val stats: StatCounter = new StatCounter()
var missing: Long = 0
def add(x: Double): NAStatCounter = {
if (java.lang.Double.isNaN(x)) {
missing += 1
} else {
stats.merge(x)
}
this
}
def merge(other: NAStatCounter): NAStatCounter = {
stats.merge(other.stats)
missing += other.missing
this
}
override def toString = {
"stats: " + stats.toString + " NaN: " + missing
}
}
object NAStatCounter extends Serializable {
def apply(x: Double) = new NAStatCounter().add(x)
}
{code}
To solve this error, the scala/spark repl support the `paste mode` as described
[here|https://www.safaribooksonline.com/library/view/scala-cookbook/9781449340292/ch14s03.html].
As for now, the only solution is to attach the class and object definition on
the same line using a semi-colon as followed :
{code}
import org.apache.spark.util.StatCounter
class NAStatCounter extends Serializable {
val stats: StatCounter = new StatCounter()
var missing: Long = 0
def add(x: Double): NAStatCounter = {
if (java.lang.Double.isNaN(x)) {
missing += 1
} else {
stats.merge(x)
}
this
}
def merge(other: NAStatCounter): NAStatCounter = {
stats.merge(other.stats)
missing += other.missing
this
}
override def toString = {
"stats: " + stats.toString + " NaN: " + missing
}
}; object NAStatCounter extends Serializable {
def apply(x: Double) = new NAStatCounter().add(x)
}
{code}
So what do you think ? Is it possible to support this paste mode ?
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