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Scala, 52 bytes Stream.from(1).filter(x=>x%(x+"":\0)(_+_-48)<1).take Try it in Scastie! Woo, 3 deprecation warnings! (okay, one of them could be fixed but I like to live dangerously) St...
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#2: Post edited
by
user
·
2022-08-12T13:19:42Z (over 2 years ago)
- # Scala, 52 bytes
- ```scala
- Stream.from(1).filter(x=>x%(x+"":\0)(_+_-48)<1).take
- ```
- [Try it in Scastie!](https://scastie.scala-lang.org/oMucQkxdSB23HjP0mYI8Pg)
Woo, 3 deprecation warnings! (okay, one of them could be fixed but I like to live dangerously)
- # Scala, 52 bytes
- ```scala
- Stream.from(1).filter(x=>x%(x+"":\0)(_+_-48)<1).take
- ```
- [Try it in Scastie!](https://scastie.scala-lang.org/oMucQkxdSB23HjP0mYI8Pg)
- Woo, 3 deprecation warnings! (okay, one of them could be fixed but I like to live dangerously)
- `Stream.from(1)` constructs an infinite list of positive integers. Then we `filter` the `x`'s that are Niven numbers. `(x+"":\0)(_+_-48)` finds the sum of the `x`'s digits. A clearer way to write that would be `x.toString.foldRight(0)((sum, char) => sum + char.toInt - '0'.toInt)`. At the end, only the first `n` Niven numbers are `take`n from the infinite list.
#1: Initial revision
by
user
·
2022-08-12T13:16:09Z (over 2 years ago)
# Scala, 52 bytes ```scala Stream.from(1).filter(x=>x%(x+"":\0)(_+_-48)<1).take ``` [Try it in Scastie!](https://scastie.scala-lang.org/oMucQkxdSB23HjP0mYI8Pg) Woo, 3 deprecation warnings! (okay, one of them could be fixed but I like to live dangerously)