Trending questions in Apache Spark

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How to reverse a Scala list?

Hi, This reverses the order of elements in ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
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67 views
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How to access variables in s string interpolation in Scala?

Hey, You can use below code to access variables ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
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72 views
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How shallow copy carry out using Scala?

Hey, Scala uses the method copy() to carry ...READ MORE

Jul 31, 2019 in Apache Spark by Gitika
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54 views
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How fault tolerance is achieved in Apache Spark?

Hey, In Apache Spark, the data storage model is ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
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442 views
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How to define SparkConf?

Can anyone explain how to define SparkConf? READ MORE

Aug 1, 2019 in Apache Spark by Danish
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RDD word count with line numbers

df = spark.createDataFrame([("A", 2000), ("A", 2002), ("A", ...READ MORE

Jul 25, 2019 in Apache Spark by Siri
308 views
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How to format a string in Scala?

Hey, To format a string, use the .format ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
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73 views
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How to concatenate sets in Scala?

Hey, Yes, there are two ways of doing ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
• 28,810 points
75 views
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1 answer

How 'Scala Higher Order function' works in Scala?

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

Jul 30, 2019 in Apache Spark by Gitika
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69 views
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1 answer

What is Lazy val in Scala?

Hey, Scala executes a val when we define ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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105 views
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What is the differentiate between equals() and == in Scala. Is the latter the same as == in Java?

Hey, When we try to compare two instances ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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102 views
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How to find values common to two sets in Scala

Hey, There are two ways to find the ...READ MORE

Jul 30, 2019 in Apache Spark by Gitika
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51 views
0 votes
1 answer

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
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48 views
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what is an anonymous function Scala?

Hi, An anonymous function in Scala is a ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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91 views
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What is Action in Spark?

Hi, Actions are RDD’s operation, that value returns ...READ MORE

Jul 3, 2019 in Apache Spark by Gitika
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1,216 views
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What is Case Class in Scala?

Hey, Scala case classes let us model immutable data. ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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78 views
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How to declare a Empty Scala Map?

Hi, You can either declare an empty Scala ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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edited Jul 29, 2019 by Gitika 65 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
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64 views
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1 answer

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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53 views
0 votes
1 answer

How to fit multiple assignment statements into one statement in Scala?

Hi, You can assign a Tuple to a ...READ MORE

Jul 29, 2019 in Apache Spark by Gitika
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44 views
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error:error: only classes can have declared but undefined members.

Hi, This happens in Scala whenever you won't ...READ MORE

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

Query regarding Appending " to a string in Scala

You can perform this task in two ...READ MORE

Jul 10, 2019 in Apache Spark by Esha
850 views
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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
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31 views
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1 answer

Scala: error: value unary_+ is not a member of (Int, Int)

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

Jul 22, 2019 in Apache Spark by karan
320 views
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1 answer

How to check if a particular keyword exists in Apache Spark?

Hey, You can try this code to get ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
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314 views
0 votes
1 answer

Spark Submit: class does not exists

In the command, you have mentioned the ...READ MORE

Jul 26, 2019 in Apache Spark by Jimmy
154 views
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1 answer

Average function is not commutative and associative?

Hey, I guess the only problem with the ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
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289 views
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1 answer

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
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99 views
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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
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100 views
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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
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87 views
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Query regarding Operator Overloading in Scala

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

Jul 10, 2019 in Apache Spark by Karan
780 views
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What is function currying in Scala?

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

Jul 26, 2019 in Apache Spark by Gitika
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80 views
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Spark-shell not working

First, reboot the system. And after reboot, ...READ MORE

Jul 15, 2019 in Apache Spark by Mahesh
559 views
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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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68 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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62 views
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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
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53 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
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50 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
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46 views
0 votes
1 answer

How to load data of .csv file in MySQL Database Table?

You can do it using a code ...READ MORE

Jul 22, 2019 in Apache Spark by Vishwa
218 views
+1 vote
1 answer

What is reduce() action in Spark?

Hey, It takes a function that operates on two ...READ MORE

Jul 2, 2019 in Apache Spark by Gitika
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1,043 views
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Explain the for loop for printing the Map values in Scala in Apache Spark?

Hey, You can see this following code to ...READ MORE

Jul 22, 2019 in Apache Spark by Gitika
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201 views
+1 vote
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Error: value textfile is not a member of org.apache.spark.SparkContext

Hi, Regarding this error, you just need to change ...READ MORE

Jul 4, 2019 in Apache Spark by Gitika
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957 views
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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
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72 views
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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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65 views
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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
• 28,810 points
63 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
• 28,810 points
61 views
0 votes
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
105 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
• 28,810 points
57 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
59 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
• 28,810 points
54 views