List[(Double, Double)]

[Meeraj Kunnumpurath]

Hello,

The following two lines seem to be killing the compiler

val x = List((1.0, 2.0))

x.map { case(x, y) => x + y }

However, the below seems to be working

List((1.0, 2.0)).map { case(x, y) => x + y }

Thank you

--

Meeraj Kunnumpurath

[Roland Kuhn]

Killed how? And which version of which compiler?

Welcome to Scala 2.12.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_121).

Type in expressions for evaluation. Or try :help.

scala> val x = List((1.0, 2.0))

x: List[(Double, Double)] = List((1.0,2.0))

scala> x.map { case(x, y) => x + y }

res0: List[Double] = List(3.0)

(it would have surprised me a lot if this expression did not compile)

Regards,

Roland

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[Meeraj Kunnumpurath]

Thank you

Welcome to Scala version 2.11.5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_20).

java.lang.AssertionError: assertion failed: List(value _1$mcD$sp, value _1$mcD$sp, value _1$mcD$sp)

at scala.reflect.internal.Symbols$Symbol.suchThat(Symbols.scala:1916)

at scala.tools.nsc.transform.SpecializeTypes$$anon$2.matchingSymbolInPrefix$1(SpecializeTypes.scala:1460)

.....

That entry seems to have slain the compiler.  Shall I replay

your session? I can re-run each line except the last one.

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Meeraj Kunnumpurath
Director and Executive Principal
Service Symphony Ltd
00 44 7702 693597

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mee...@servicesymphony.com

[Meeraj Kunnumpurath]

Updated to 2.11.7 and runs okay.

Thank you

Meeraj

[Roland Kuhn]

I don’t have 2.11.5 handy, but 2.11.2 works just fine for me.

Your JDK version is very much outdated, though.

Regards,

Roland

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[Meeraj Kunnumpurath]

Thanks.

I noticed the JDK version, it is not a machine I normally use for dev.

Thank you

Sent from my iPhone