Trending questions in Apache Spark

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How to declare sets with value in Scala?

Hey, You can follow this code: scala> var s=Set(1,4,4,3) s: ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
• 65,870 points
120 views
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1 answer

Load custom delimited file in Spark

Refer to the following code: val sqlContext = ...READ MORE

Jul 24, 2019 in Apache Spark by Ritu
375 views
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How the if-else statement is different for Scala and Java?

Hey, There is one main difference. This statement ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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149 views
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1 answer

How do I access the Map Task ID in Spark?

You can access task information using TaskContext: import org.apache.spark.TaskContext sc.parallelize(Seq[Int](), ...READ MORE

Jul 23, 2019 in Apache Spark by ravikiran
• 4,620 points
395 views
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How to search for a Key in a Scala Map?

Hey, The Map.contains() method will tell you if ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
• 65,870 points
135 views
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Scala: when to use x(2) and x._2?

In the above statement, x(2) is specifying an array ...READ MORE

Jul 22, 2019 in Apache Spark by Yogi
415 views
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What is the work of Yield Keyword in Scala?

Hey, Used with a loop, yield produces a value for ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
235 views
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1 answer

How to use nested function in Scala?

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

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
228 views
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1 answer

Consider for-comprehensions in Scala. What are they syntactic sugars for?

Hi, A for-comprehension is one way to carry ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
• 65,870 points
91 views
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1 answer

What is function currying in Scala?

Hi, With Scala Currying, we can take a ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
216 views
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1 answer

How to use Scala anonymous functions and why do we use it?

Hi, Anonymous functions in Scala is the lightweight ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
179 views
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1 answer

Different types of identifiers in Scala?

Hey, We have four kinds of identifiers in ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
174 views
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1 answer

What is tail-recursion in Scala?

Hey, Recursion is when a function makes a ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
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172 views
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1 answer

Query regarding Operator Overloading in Scala

All prefix operators' symbols are predefined: +, -, ...READ MORE

Jul 10, 2019 in Apache Spark by Karan
866 views
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What is a lens in Scala?

Hi, A lens is an abstraction from functional ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
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169 views
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What is Map and flatMap in Spark?

Hi, The map is a specific line or ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
• 65,870 points
1,161 views
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1 answer

What is RDD Lineage in Spark?

Hey, Lineage is an RDD process to reconstruct ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
• 65,870 points
1,118 views
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1 answer

How to concatinating Arrays in scala?

Hey, We can append a Scala array to ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
176 views
0 votes
1 answer

How to create scala project in intellij?

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

Jul 5, 2019 in Apache Spark by Jimmy
1,050 views
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What is recursion in Scala function? How does it works?

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

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
177 views
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1 answer

How to create Scala function using "Def" keyword?

Hi, To create a Scala function, we use ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
164 views
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1 answer

How does Closure function works in Scala?

Hi, A closure in Scala is a function ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
114 views
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1 answer

Which Scala library is used for functional programming?

Hi, Scala library has purely functional data structures ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
• 65,870 points
199 views
0 votes
1 answer

What is Options in Scala?

Hey, A Scala Option is a kind of ...READ MORE

Jul 26, 2019 in Apache Spark by Gitika
• 65,870 points
108 views
0 votes
1 answer

How to declare Scala array?

Hi, We can declare Scala arrays in two ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
153 views
0 votes
1 answer

What is exception propagation in Scala?

Hi, When a function experiences an exception, it ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
132 views
0 votes
1 answer

Load CSV file data inot MySQL

If you are trying to load file ...READ MORE

Jul 25, 2019 in Apache Spark by Sita
133 views
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1 answer

What is BitSet in Scala?

Hey, A BitSet is a set of non-negative ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
130 views
0 votes
1 answer

What is “Unit” and “()” in Scala?

Hey, Unit is a subtype of scala.anyval and ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
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168 views
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1 answer

How to create Scala Array with Range?

Hey, The range() method will give us integers ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
125 views
0 votes
1 answer

Spark Installation problem

After downloading Spark, you need to set ...READ MORE

Jul 5, 2019 in Apache Spark by Rishi
996 views
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1 answer

What is Streams in Scala?

Hi, A stream is a lazy list as ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
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124 views
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Load data to mysql from local

I'm trying to load data to mysql ...READ MORE

Jul 23, 2019 in Apache Spark by Yogi
248 views
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Why do we need App in Scala?

Hey, The app is a helper class that ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
• 65,870 points
150 views
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What is the advantage of having immutability in design for Scala programming language?

Hi, Scala uses immutability by default in most ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
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144 views
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1 answer

How to process an Array in Scala?

Hi, We can use loop control structures to ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
98 views
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1 answer

At which point of time Scala will take default arguments?

Hi, If we omit an argument in a ...READ MORE

Jul 25, 2019 in Apache Spark by Gitika
• 65,870 points
97 views
0 votes
1 answer

How is Val different from var in Scala?

Hey, In this language, val is a value and var is ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
• 65,870 points
129 views
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1 answer

Explain vararg arguments.

Hey, With varargs, we can pass a variable ...READ MORE

Jul 24, 2019 in Apache Spark by Gitika
• 65,870 points
105 views
0 votes
1 answer

Pyspark is taking default path

The HDFS path for MyLab is /user/edureka_id. ...READ MORE

Jul 16, 2019 in Apache Spark by Khushi
461 views
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1 answer

Error: Loading data to mysql

You have to use sqoop to export data ...READ MORE

Jul 23, 2019 in Apache Spark by Janan
143 views
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1 answer

Spark Processing Internals

Spark uses a master/slave architecture. As you ...READ MORE

Jul 15, 2019 in Apache Spark by Jimmy

edited Jun 9, 2020 by MD 440 views
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Appending " to a string in Scala

1) Use the concat() function. Refer to the below ...READ MORE

Jul 23, 2019 in Apache Spark by Ritu
93 views
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1 answer

Code to compute average in Apache Spark?

Hi, You can compute the average using this ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
• 65,870 points
115 views
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0 answers

What is immutabiliity in Spark?

Can anyone explain what is immutability in ...READ MORE

Jul 23, 2019 in Apache Spark by Risha
81 views
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1 answer

What is Spark Driver?

Hi, Spark Driver is the program that runs ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
• 65,870 points
778 views
0 votes
1 answer

Which syntax to use to take the sum of list of collection in scala?

Hi, You can see this example to get ...READ MORE

Jul 5, 2019 in Apache Spark by Gitika
• 65,870 points
755 views
0 votes
1 answer

Spark memory processing on a not temporary table

Temporary table is more like an index ...READ MORE

Jul 14, 2019 in Apache Spark by Suri
387 views
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1 answer

Spark on Yarn

If you just want to get your ...READ MORE

Jul 18, 2019 in Apache Spark by ravikiran
• 4,620 points
171 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

Jul 5, 2019 in Apache Spark by Gitika
• 65,870 points
696 views