scala> val x = math.pow(5, 1/3d) + 1/0 // linter:ignore UseCbrt,DivideByZero // ignores UseCbrt and DivideByZero
<console>:8: warning: Integer division detected in an expression assigned to a floating point variable.
              math.pow(5, 1/3d) + 1/0 // linter:ignore UseCbrt,DivideByZero // ignores UseCbrt and DivideByZero
                                ^
scala> val x = math.pow(5, 1/3d) + 1/0 // linter:ignore // ignores all warnings

scala> if (a == 10 || b == 10) 0 else if (a == 20 && b == 10) 1 else 2
<console>:10: warning: This condition has appeared earlier in the if-else chain and will never hold here.
              if (a == 10 || b == 10) 0 else if (a == 20 && b == 10) 1 else 2
                                                              ^

scala> if (b > 4) (2,a) else (2,a)
<console>:9: warning: If statement branches have the same structure.
              if (b > 4) (2,a) else (2,a)
                    ^

scala> if (a == b) true else false
<console>:9: warning: Remove the if expression and use the condition directly.
              if (a == b) true else false
              ^

scala> (x,y) match { case (a,5) if a > 5 => 0 case (c,5) if c > 5 => 1 }
<console>:10: warning: Identical case condition detected above. This case will never match.
              (x,y) match { case (a,5) if a > 5 => 0 case (c,5) if c > 5 => 1 }
                                                          ^

scala> a match { case 3 => "hello" case 4 => "hello" case 5 => "hello" case _ => "how low" }
<console>:9: warning: Bodies of 3 neighbouring cases are identical and could be merged.
              a match { case 3 => "hello" case 4 => "hello" case 5 => "hello" case _ => "how low" }
                                                                      ^

scala> bool match { case true => 0 case false => 1 }
<console>:9: warning: Pattern matching on Boolean is probably better written as an if statement.
              a match { case true => 0 case false => 1 }
                ^

scala> for (i <- 10 to 20) { if (i > 20) "" }
<console>:8: warning: This condition will never hold.
              for (i <- 10 to 20) { if (i > 20) "" }
                                          ^

scala> for (i <- 1 to 10) { 1/(i-1)  }
<console>:8: warning: You will likely divide by zero here.
              for (i <- 1 to 10) { 1/(i-1)  }
                                    ^

scala> { val a = List(1,2,3); for (i <- 1 to 10) { println(a(i)) } }
<console>:8: warning: You will likely use a too large index.
              { val a = List(1,2,3); for (i <- 1 to 10) { println(a(i)) } }
                                                                   ^

scala> for (i <- 10 to 20) { if (i.toString.length == 3) "" }
<console>:8: warning: This condition will never hold.
              for (i <- 10 to 20) { if (i.toString.length == 3) "" }
                                                          ^

scala> { val a = "hello"+util.Random.nextString(10)+"world"+util.Random.nextString(10)+"!"; if (a contains "world") ""; if (a startsWith "hell") "" }
<console>:8: warning: This contains will always returns the same value: true
              { val a = "hello"+util.Random.nextString(10)+"world"+util.Random.nextString(10)+"!"; if (a contains "world") ""; if (a startsWith "hell") "" }
                                                                                                                   ^
<console>:8: warning: This startsWith always returns the same value: true
              { val a = "hello"+util.Random.nextString(10)+"world"+util.Random.nextString(10)+"!"; if (a contains "world") ""; if (a startsWith "hell") "" }
                                                                                                                                                ^

scala> str.replaceAll("?", ".")
<console>:9: warning: Regex pattern syntax error: Dangling meta character '?'
              str.replaceAll("?", ".")
                             ^

scala> math.log(1d + a)
<console>:9: warning: Use math.log1p(x), instead of math.log(1 + x) for added accuracy when x is near 0.
              math.log(1 + a)
                      ^

scala> BigDecimal(0.555555555555555555555555555)
<console>:8: warning: Possible loss of precision. Literal cannot be represented exactly by Double. (0.555555555555555555555555555 != 0.5555555555555556)
              BigDecimal(0.555555555555555555555555555)
                        ^

scala> val a = Some(List(1,2,3)); if (a.size > 3) ""
<console>:9: warning: Did you mean to take the size of the collection inside the Option?
              if (a.size > 3) ""
                    ^

scala> if (strOption.isDefined) strOption.get else ""
<console>:9: warning: Use strOption.getOrElse(...) instead of if (strOption.isDefined) strOption.get else ...
              if (strOption.isDefined) strOption.get else ""
                                       ^

scala> List(1,2,3,4).find(x => x % 2 == 0).isDefined
<console>:8: warning: Use col.exists(...) instead of col.find(...).isDefined.
              List(1,2,3,4).find(x => x % 2 == 0).isDefined
                            ^

scala> List(1,2,3,4).flatMap(x => if (x % 2 == 0) List(x) else Nil)
<console>:8: warning: Use col.filter(x => condition) instead of col.flatMap(x => if (condition) ... else ...).
              List(1,2,3,4).flatMap(x => if (x % 2 == 0) List(x) else Nil)
                                   ^

scala> def func(b: Int, c: String, d: String) = { println(b); b+c }
<console>:7: warning: Parameter d is not used in method func
              def func(b: Int, c: String, d: String) = { println(b); b+c }
                  ^

scala> List(1, 2, 3).contains("4")
<console>:29: warning: List[Int].contains(String) will probably return false, since the collection and target element are of unrelated types.
               List(1, 2, 3).contains("4")
                             ^

scala> Nil == None
<console>:29: warning: Comparing with == on instances of unrelated types (scala.collection.immutable.Nil.type, None.type) will probably return false.
               Nil == None
                   ^