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t7715.scala:8: error: error in interpolated string: identifier or block expected
days map s"On the $_th day of Christmas" foreach println
^
t7715.scala:10: error: error in interpolated string: identifier or block expected
val rf = (n: Int) => s"\\*{$_}"(n).r
^
t7715.scala:17: error: unbound placeholder parameter
days zip days map s"${_: Int} by ${_: Int}".tupled foreach println
^
t7715.scala:17: error: unbound placeholder parameter
days zip days map s"${_: Int} by ${_: Int}".tupled foreach println
^
four errors found
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