Scala Converting multiline string to BigInt

问题

I'm trying to parse 100 50-digit numbers from string with below piece of code:

val input = """37107287533902102798797998220837590246510135740250
          |46376937677490009712648124896970078050417018260538
          |74324986199524741059474233309513058123726617309629""".stripMargin
val list = input.split("""\n""").map(BigInt(_))

but I'm ending with "java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)". I don't have any idea why this does not work, since when string is splited, each element of list is of type String. Any help would be much appreciated.

Best regards

回答1:

Probably you're on Windows, where the EOL is \r\n.

You've got to strip that, too.

Here, I rebooted into Windows to demo...

apm@halyard ~/tmp
$ vi bigbomb.scala

apm@halyard ~/tmp
$ skalac bigbomb.scala ; skala bigbomb.Test
"ava.lang.NumberFormatException: For input string: "35740250
        at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

Note that in cygwin, I have to :se fileformat=dos in vi to use the \r\n line endings.

Here is an example where the unacknowledged impedance mismatch between the source EOL and the runtime EOL bugged me:

some dumb code

You want to use s.lines.mkString to strip it out.

来源：https://stackoverflow.com/questions/17090537/scala-converting-multiline-string-to-bigint

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string