scala-collections

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Scala List.updated

I am curious about List.updated. What is it\'s runtime? And how does it compare to just changing one element in an ArrayBuffer? In the background, how does it deal with copying all of the list? Is thi[详细]

2023-04-13 08:51 分类：问答
Preferred Scala collection for progressively removing random items?

I have an algoritm which takes many iterations, each of which scores items in a collection and removes the one with the highest score.[详细]

2023-04-13 01:48 分类：问答
How to convert a Map[K, Option[V]] to Map[K, V] discarding Nones in Scala? [duplicate]

This question already has answers here: Closed 11 years ago. Possible Duplicate: Better way of converting a Map[K, Option[V]] to a Map[K,V][详细]

2023-04-12 04:19 分类：问答
How to write tuple range function in scala?

I want following function range((1,1), (2,2)) which return Seq[(Int,Int)]((1,1),(1,2),(2,1),(2,2)) It is analog for one dimensional range with 1 to 2[详细]

2023-04-09 23:24 分类：问答
java.util.Iterator to Scala list?

I have the following code: private lazy val keys: List[String] = obj.getKeys().asScala.toList obj.getKeys returns a java.util.Iterator<java.lang.String>[详细]

2023-04-08 05:33 分类：问答
Why do mutable and immutable ListMaps have different orders in Scala?

Why does the immutable version of the ListMap store in 开发者_开发知识库ascending order, while mutable version stores in descending order?[详细]

2023-04-06 23:50 分类：问答
How to create a new ButtonGroup in scala containing RadioButtons?

I am having trouble creating a ButtonGroup containing radio buttons in the Scala Programming Language.The code I am using is as following:[详细]

2023-04-06 20:08 分类：问答
Extending collection classes with extra fields in Scala

I\'m looking to create a class that is basically a collection with an extra field. However, I keep running into problems and am wondering what the best way of implementing this is. I\'ve tried to foll[详细]

2023-04-05 21:23 分类：问答
What operations are performed in bulk when using parallel collections? Strange behavior here

Input the following little sequential program and its parallelized version in Scala REPL: /* Acti开发者_Python百科vate time measurement in \"App\" class. Prints [total <X> ms] on exit. */[详细]

2023-04-05 11:46 分类：问答
Scala: What is the difference between Traversable and Iterable traits in Scala collections?

I have looked at this question but still don\'t understand the difference between Iterable and 开发者_StackOverflow社区Traversable traits. Can someone explain ?Think of it as the difference between bl[详细]

2023-04-05 03:54 分类：问答