How to convert this Map to a List

[Cecil Westerhof]

I have the following Map:
    Map('4' -> 1, 'A' -> 1, '5' -> 1, '2' -> 1, '3' -> 1)

I want to convert it to the following List:

    List("14", "1A", "15", "12", "13")

How would I do that?

--
Cecil Westerhof

[Dennis Haupt]

untested and could surely be done more efficiently, but should work

toList.map(e => List(e._2, e._1).mkString)

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[Oliver Ruebenacker]

On Tue, Mar 18, 2014 at 4:20 PM, Dennis Haupt <d.ha...@gmail.com> wrote:

untested and could surely be done more efficiently, but should work

toList.map(e => List(e._2, e._1).mkString)

 

toList.map(e => "" + e._2 + e._1)

2014-03-18 21:18 GMT+01:00 Cecil Westerhof <cldwes...@gmail.com>:

I have the following Map:
    Map('4' -> 1, 'A' -> 1, '5' -> 1, '2' -> 1, '3' -> 1)

I want to convert it to the following List:

    List("14", "1A", "15", "12", "13")

How would I do that?

--
Cecil Westerhof

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Oliver Ruebenacker

Founder at Relomics Consulting

Be always grateful, but never satisfied.

[Dennis Haupt]

i got that idea too, but i try to avoid the ""+ hack at all costs :|

data.toList.map(e => s"${e._2}${e._1}")

[Cecil Westerhof]

Should have gone to the list.

---------- Forwarded message ----------
From: Cecil Westerhof <cldwes...@gmail.com>
Date: 2014-03-18 21:34 GMT+01:00
Subject: Re: [scala-user] How to convert this Map to a List
To: Dennis Haupt <d.ha...@gmail.com>

2014-03-18 21:28 GMT+01:00 Dennis Haupt <d.ha...@gmail.com>:

i got that idea too, but i try to avoid the ""+ hack at all costs :|

data.toList.map(e => s"${e._2}${e._1}")

This gives a scala.collection.immutable.Iterable[String]

So I put a .toList after. In that way I can do thisList(1) and get "1A".

--
Cecil Westerhof

--
Cecil Westerhof

[Alan Burlison]

On 18/03/2014 20:18, Cecil Westerhof wrote:

> How would I do that?

Yet another wrinkle:

m.map({ case (a,b) => b.toString + a })

I think the answer to your question is "lots of ways" :-)

--
Alan Burlison
--

[Lanny Ripple]

m.map {case (a,b) => s"$b$a"}

$0.02USD

[Dennis Haupt]

me too, me too

m.map(_.swap.productIterator.mkString) 

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[Lanny Ripple]

http://www.youtube.com/watch?v=GvnhNeHAafg  :)