Creating classes that can be instantiated with single or multiple elements as constructor's argument

Posted by Jeriho on Stack Overflow See other posts from Stack Overflow or by Jeriho
Published on 2010-06-01T13:14:52Z Indexed on 2010/06/02 12:34 UTC
Read the original article Hit count: 184

Filed under:

scala

|

collections

I want to have class that can be instantiated with list, array, seq, set, stack, queue etc. In my opinion

class A
class B(elems:A*)

should handle such stuff.

This is my solution:

class A
class B(elems:Iterable[A]){
    def this(elem:A) = this(Seq(elem))
}

Can you suggest any improvements?

Related posts about scala

ensime scala errors (class scala.Array not found, object scala not found)

as seen on Stack Overflow - Search for 'Stack Overflow'
I've installed ensime according to the README.md file, however, I get errors in the inferior-ensime-server buffer with the following: INFO: Fatal Error: scala.tools.nsc.MissingRequirementError: object scala not found. scala.tools.nsc.MissingRequirementError: object scala not found. at scala… >>> More
infinite loop shutting down ensime

as seen on Stack Overflow - Search for 'Stack Overflow'
When I run M-X ensime-disconnect I get the following forever: string matching regex `\"((?:[^\"\\]|\\.)*)\"' expected but `^@' found and I see this exception when I use C-c C-c Uncaught exception in com.ensime.server.SocketHandler@769aba32 java.net.SocketException: Broken pipe at java… >>> More
How to resolve java.nio.charset.UnmappableCharacterException in Scala 2.8.0?

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm using Scala 2.8.0 and trying to read pipe delimited file like in code snipped below: object Main { def main(args: Array[String]) :Unit = { if (args.length > 0) { val lines = scala.io.Source.fromPath("QUICK!LRU-2009-11-15.psv") for (line <-lines) print(line) } … >>> More
Question on Scala Closure (From "Programming in Scala")

as seen on Stack Overflow - Search for 'Stack Overflow'
I don't understand why authors said that Code Listing 9.1 from "Programming in Scala" use closure. In chapter 9, they show how to refactor code into more less duplicated form, from this original code: object FileMatcher { private def filesHere = (new java.io.File(".")).listFiles def filesEnding(query:… >>> More
Common idiom in Java to Scala, traverse/Iterate Java list into Scala list

as seen on Stack Overflow - Search for 'Stack Overflow'
I am processing a XML document and iterating through nodes. I want to iterate through the nodes and build a new List of some type. How would I do this with Scala: Here is my XML traverse code: def findClassRef(xmlNode: Elem) = { xmlNode\"classDef" foreach { (entry) => val name… >>> More

Developer IT

Creating classes that can be instantiated with single or multiple elements as constructor's argument - Developer IT

Creating classes that can be instantiated with single or multiple elements as constructor's argument

scala

collections

Related posts about scala

ensime scala errors (class scala.Array not found, object scala not found)

infinite loop shutting down ensime

How to resolve java.nio.charset.UnmappableCharacterException in Scala 2.8.0?

Question on Scala Closure (From "Programming in Scala")

Common idiom in Java to Scala, traverse/Iterate Java list into Scala list

Related posts about collections

Creating a custom collections class using System.Collections.CollectionBase

C#/.NET Little Wonders: The Concurrent Collections (1 of 3)

C#/.NET Fundamentals: Choosing the Right Collection Class

Using Tree(Map,Set) in Collections

Using Tree(Map,Set) in Collections

Categories cloud