How does Closure function works in Scala

0 votes
Can anyone explain how closure function works in Scala?
Jul 26, 2019 in Apache Spark by Mehnaj
91 views

1 answer to this question.

0 votes

Hi,

A closure in Scala is a function whose value depends on variables declared outside of it. Let’s take an example:

scala> var c=5

c: Int = 5

scala> val mul2=(a:Int,b:Int)=>(a+b)*c

mul2: (Int, Int) => Int = $$Lambda$1533/239864031@6d90e705

scala> mul2(2,3)

The output will be:

Int = 25

scala> c=7

c: Int = 7

scala> mul2(2,3)

The output will be:

Int = 35

Here mul2 reads the new value of ‘c’ when we call it a second time.


answered Jul 26, 2019 by Gitika
• 65,850 points

Related Questions In Apache Spark

0 votes
2 answers

How to execute a function in apache-scala?

Function Definition : def test():Unit{ var a=10 var b=20 var c=a+b } calling ...READ MORE

answered Aug 5, 2020 in Apache Spark by Ramkumar Ramasamy
159 views
0 votes
1 answer

How can we iterate any function using "foreach" function in scala?

Hi, Yes, "foreach" function you use because it will ...READ MORE

answered Jul 5, 2019 in Apache Spark by Gitika
• 65,850 points
639 views
0 votes
1 answer

How to use nested function in Scala?

Hey, With Scala, we can define a Scala ...READ MORE

answered Jul 26, 2019 in Apache Spark by Gitika
• 65,850 points
185 views
0 votes
1 answer

How does partitioning work in Spark?

By default a partition is created for ...READ MORE

answered May 31, 2018 in Apache Spark by nitinrawat895
• 11,380 points
280 views
+1 vote
2 answers
+1 vote
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
• 11,380 points
6,639 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
• 11,380 points
1,046 views
+2 votes
11 answers

hadoop fs -put command?

Hi, You can create one directory in HDFS ...READ MORE

answered Mar 16, 2018 in Big Data Hadoop by nitinrawat895
• 11,380 points
45,344 views
0 votes
1 answer

What is recursion in Scala function? How does it works?

Hey, A Scala function involves recursion when it ...READ MORE

answered Jul 25, 2019 in Apache Spark by Gitika
• 65,850 points
133 views
0 votes
1 answer

How 'Scala Higher Order function' works in Scala?

Hey, Scala allows the definition of a higher-order function. These ...READ MORE

answered Jul 30, 2019 in Apache Spark by Gitika
• 65,850 points
149 views