I encountered the bug in Mime Types puzzle
mime type line contains two “words” separated by a space
stubs for reading it looks like this:
val Array(EXT, MT) = readLine split " "
and it produces following errors:
/tmp/Solution.scala:14: error: not found: value EXT val Array(EXT, MT) = readLine split " " ^ /tmp/Solution.scala:14: error: not found: value MT val Array(EXT, MT) = readLine split " " ^
the thing is that this code uses patter matching and identifiers that starts with upper case letters are treated like constants to match against (so called “stable identifiers”).
this code can be fixed in two ways.
First (good and canonical) way is to convert variables into lower case:
val Array(ext, mt) = readLine split " "
Second way, ugly and bad, is to read result into separate array variable and extract values later:
val inputs = readLine split " " val EXT = inputs(0) val MT = inputs(1)