Bogart Salzberg wrote:
Is there a compelling reason why lc() and friends must return a defined value at all times? Just curious...
Not sure if you got an answer to your question or not, but essentially, yes.
lc is defined as modifying a string by performing the appropriate upcase operation on all of its elements.
When an undefined value is treated as a string, it is converted into the empty string (this is universal in perl).
So, in essence this is the same as performing math on undef and getting back 0.
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