Use of uninitialized value in string "X" in two lines

[Blaine Schmidt]

When running the mysqltuner script according to the directions on the launpad.net page, we received two errors, both involving use of uninitialized variables. The first (at approximate line 223) involved "$num" and the second (at approximate line 230) involved "$parsedexpr.$comp" ...

With $num, there is code to check to see whether $num has been defined.

With the other, as it is a string operation (the "." concatenator), there is code to splice "$parsedexpr" and "$comp" together before operating on the string in the next line.