How to create singleton classes in Scala?

0 votes
Can anyone help me out to create a singleton classes in Scala?
Jul 31 in Apache Spark by Nimisha
36 views

1 answer to this question.

0 votes

Hey,

Scala introduces a new object keyword, which is used to represent Singleton classes. These are the class with just one instance and their method can be thought of as similar to Java's static methods. 

Here is a Singleton class in Scala:

package test

object Singleton{
  def sum(l: List[Int]): Int = l.sum
}

This sum method is available globally, and can be referred to, or imported, as the test.Singleton.sum. A singleton object in Scala can also extend classes and traits.

 

answered Jul 31 by Gitika
• 25,340 points

Related Questions In Apache Spark

0 votes
0 answers

How to create RDD from existing RDD in scala?

Can anyone suggest how to create RDD ...READ MORE

Jul 3 in Apache Spark by Nihal
17 views
0 votes
1 answer

How to create scala project in intellij?

You have to install Intellij with scala plugin. ...READ MORE

answered Jul 5 in Apache Spark by Jimmy
61 views
0 votes
11 answers

How to create new column with function in Spark Dataframe?

val coder: (Int => String) = v ...READ MORE

answered Apr 4 in Apache Spark by anonymous

edited Apr 5 by Omkar 24,154 views
0 votes
1 answer

How to execute a function in apache-scala?

Hi, Here is a simple example of how ...READ MORE

answered Jul 1 in Apache Spark by Gitika
• 25,340 points
43 views
0 votes
1 answer
0 votes
1 answer

Hadoop Mapreduce word count Program

Firstly you need to understand the concept ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,690 points
3,062 views
0 votes
1 answer

hadoop.mapred vs hadoop.mapreduce?

org.apache.hadoop.mapred is the Old API  org.apache.hadoop.mapreduce is the ...READ MORE

answered Mar 16, 2018 in Data Analytics by nitinrawat895
• 10,690 points
341 views
0 votes
10 answers

hadoop fs -put command?

put syntax: put <localSrc> <dest> copy syntax: copyFr ...READ MORE

answered Dec 7, 2018 in Big Data Hadoop by Aditya
15,033 views
0 votes
1 answer

How to create RDD from parallelized collection in scala?

Hi, You can check this example in your ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,340 points
54 views
0 votes
1 answer

How to create RDD from an external file source in scala?

Hi, To create an RDD from external file ...READ MORE

answered Jul 3 in Apache Spark by Gitika
• 25,340 points
58 views