List string int converting in scala

Question

I am confused about list of chars and int with scala. Here is my example :

scala> var s = "123456"
s: String = 123456

scala> s.map(_.toInt)
res0: scala.collection.immutable.IndexedSeq[Int] = Vector(49, 50, 51, 52, 53, 54)

scala> s.map(_.toInt).sum
res1: Int = 309

The chars are converted in ASCII code I assume, how to just transform a char in its value ?

Thank you

Clashsoft · Accepted Answer · 2017-06-20 16:31:14Z

7

s.map(_.asDigit).sum is the correct Scala API method. The toInt will return the ASCI code of the symbol, instead of the numerical representation.

scala> "123456".map(_.asDigit).sum
res0: Int = 21

edited Jun 20, 2017 at 16:31

Clashsoft

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answered Jun 20, 2017 at 16:27

flavian

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Comments

Elliott Frisch · Accepted Answer · 2017-06-20 16:31:44Z

3

You can use Character.getNumericValue(char) like

s.map(Character.getNumericValue(_))

Outputs

res2: scala.collection.immutable.IndexedSeq[Int] = Vector(1, 2, 3, 4, 5, 6)

Another option, would be subtracting '0' like

s.map(_ - '0')

for the same result.

edited Jun 20, 2017 at 16:31

answered Jun 20, 2017 at 16:26

Elliott Frisch

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