scala Archives - IT Nursery

Programming, scala

IT Nursery

(Why) do we need to call cache or persist on a RDD

When a resilient distributed dataset (RDD) is created from a text file or collection (or from another RDD), do we need to call ...

June 4, 2022
0 Comments

Programming, scala

IT Nursery

How to define “type disjunction” (union types)?

One way that has been suggested to deal with double definitions of overloaded methods is to replace overloading with pattern matching: object Bar ...

June 3, 2022
0 Comments

Programming, scala

IT Nursery

What Scala web-frameworks are available? [closed]

Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Questions asking us to recommend or find a ...

June 2, 2022
0 Comments

Programming, scala

IT Nursery

Reduce, fold or scan (Left/Right)?

When should I use reduceLeft, reduceRight, foldLeft, foldRight, scanLeft or scanRight? I want an intuition/overview of their differences – possibly with some simple ...

June 1, 2022
0 Comments

Programming, scala

IT Nursery

How do I cast a variable in Scala?

Given a variable with type Graphics, how do I cast it to Graphics2D in Scala? 2 Answers 2

May 31, 2022
0 Comments

Programming, scala

IT Nursery

Spark performance for Scala vs Python

I prefer Python over Scala. But, as Spark is natively written in Scala, I was expecting my code to run faster in the ...

May 31, 2022
0 Comments

Programming, scala

IT Nursery

What is the difference between JavaConverters and JavaConversions in Scala?

In scala.collection, there are two very similar objects JavaConversions and JavaConverters. What is the difference between these two objects? Why do they both ...

May 30, 2022
0 Comments

Programming, scala

IT Nursery

What do

I can see in the API docs for Predef that they’re subclasses of a generic function type (From) => To, but that’s all ...

May 30, 2022
0 Comments

Programming, scala

IT Nursery

When should I choose Vector in Scala?

It seems that Vector was late to the Scala collections party, and all the influential blog posts had already left. In Java ArrayList ...

May 29, 2022
0 Comments

Programming, scala

IT Nursery

difference between foldLeft and reduceLeft in Scala

I have learned the basic difference between foldLeft and reduceLeft foldLeft: initial value has to be passed reduceLeft: takes first element of the ...

May 28, 2022
0 Comments