Recent questions tagged Scala

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Q: Is there a way to ensure a type is Serializable at compile time

I work with Spark often, and it would save me a lot of time if the compiler could ensure that a type is serializable. ... T to be serializable } It's not enough to constrain T...

asked Jul 3, 2022 in Education by JackTerrance

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Q: Instanciate concrete class a generic method in scala

I have a generic method which a generic type parameter T which is a subclass of MyClass. Inside that method, I want ... of type erasure): object Demo extends App { def myMethod[T...

asked Jun 30, 2022 in Education by JackTerrance

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Q: Updating data in database in Spark using Scala

I am working on a project with spark and scala and I am new to both but with lot of help from ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Jun 19, 2022 in Education by JackTerrance

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Q: Custom table mapping type inference with Slick 3

I'm struggling to get custom defined mapping between my case classes and database tables due to type ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Jun 5, 2022 in Education by JackTerrance

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Q: How to retrieve derived classes as is from a Map?

I have to retrieve Derived class objects stored in a Map given the respective class name as key. As ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 27, 2022 in Education by JackTerrance

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Q: How to retrieve derived classes as is from a Map?

I have to retrieve Derived class objects stored in a Map given the respective class name as key. As ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 27, 2022 in Education by JackTerrance

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Q: In scala List :: doesn't do implicit conversion

In scala, it is OK to convert a variable in the Seq, but if I construct the Seq with :: it ... , JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked May 4, 2022 in Education by JackTerrance

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Q: Checking if elements of a tweets array contain one of the elements of positive words array and count

We are building sentiment analysis application and we converted our tweets dataframe to an array. We created another array ... .txt").getLines.toArray var happyCount=0 for (e...

asked Apr 26, 2022 in Education by JackTerrance

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Q: Checking if elements of a tweets array contain one of the elements of positive words array and count

We are building sentiment analysis application and we converted our tweets dataframe to an array. We created another array ... .txt").getLines.toArray var happyCount=0 for (e...

asked Apr 24, 2022 in Education by JackTerrance

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Q: Foreach not able to print the list elements

I am working on spark project using Scala. I need to print each element of a list named 'c' ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...

asked Apr 9, 2022 in Education by JackTerrance