Scala is a general purpose programming language principally targeting the Java Virtual Machine. Designed to express common programming patterns in a concise, elegant, and type-safe way, it fuses both imperative and functional programming styles.
1
vote
1answer
128 views
JSON Library - Jackson or Play Framework? [on hold]
Working on a Java and Scala code-base, there's a debate about whether to use Java's Jackson JSON or the Play Framework's JSON Library.
After reading the Play JSON Docs, as well as Chapter 9 (JSON) of ...
0
votes
0answers
47 views
What benefits do I lose by not checking IntelliJ projects into source and using a project file generator instead?
I am about to embark on a Scala project with SBT. Do I lose any benefits by not keeping the IntelliJ IDEA project file in version control?
2
votes
0answers
38 views
Scala Generic function assuming type [migrated]
When trying to define a generic method def f[T] (x:T) = x + 1 Scala gives below error
<console>:8: error: type mismatch;
found : Int(1)
required: String
def f[T] (x:T) = x + 1
...
3
votes
1answer
55 views
Understanding special Scala syntax
I can understand this:
List("one word", "another word") unzip (_ span (_ != ' '))
But don't get what's happening here below in the span. span takes a predicate and I think the braces can be omitted ...
1
vote
2answers
379 views
Learning Scala, feeling discouraged [closed]
I'm coming from a Java background and trying to learn Scala. At the moment I'm feeling pretty overwhelmed, there seems to be so much more to learn with Scala, so many different ways of doing the same ...
0
votes
1answer
36 views
Scala class with constructor requiring parameter of the same Class type
I can't remember but recently in one of the APIs I saw something like this class A (member:A){}. Scala does support it and there is no problem creating such a class but how do we initiate it and what ...
2
votes
6answers
398 views
How do you move beyond code examples without a project?
I am currently learning Scala and I find a mental blog of how to proceed to a degree where I can use Scala daily beyond the normal examples. I just do not have a particular project in mind of what I ...
1
vote
2answers
106 views
Is short-circuit evaluation a consequence of call-by-name?
If the boolean operators &&, || are implemented as infix methods, then isn't short-circuit evaluation just a consequence of being implemented using call-by-name semantics, since, for example, ...
4
votes
3answers
637 views
Why Big Data Needs To Be Functional?
I started working on a new project lately related to Big Data for my internship.
My managers recommended to start learning functional programming (They highly recommended Scala).
I had a humbled ...
-1
votes
1answer
236 views
Why the Scala fascination with flatmap? (This doesn't seem to be the same for mapcat in the Clojure world) [closed]
In the Scala community - there is an apparent fascination with the FlatMap function.
Now I understand that FlatMap is significant because it is used for the bind part of a Monad. (and that the ...
5
votes
1answer
272 views
What is the difference between self-types and trait inheritance in Scala?
When Googled, many responses for this topic come up. However, I don't feel like any of them do a good job of illustrating the difference between these two features. So I'd like to try one more time, ...
-6
votes
3answers
490 views
Are Extension methods (C#) and categories (Objective-C) the same as traits? [closed]
According to:
Something similar to Objective-C categories in other languages?
Static extension methods in C# are basically the same thing as Objective-C categories, so I'm going to lump these two ...
6
votes
1answer
292 views
Why appending to a list in Scala should have O(n) time complexity?
I am learning Scala at the moment and I just read that the execution time of the append operation for a list (:+) grows linearly with the size of the list.
Appending to a list seems like a pretty ...
1
vote
1answer
159 views
Is there a representation for mixins or traits on UML?
Is there a representation for modern programming constructs that are becoming common in modern OOP/hybrid languages like mixins/traits/categories/partial classes ?
4
votes
1answer
250 views
What kind of problems is an Android beginner likely to encounter in using Scala?
I am a hobbyist programmer who makes and maintains one production system, largely coded in Python, which now has to be ported to Android. I don't know Java at all. However, SL4A in Android makes ...
