I have two questions that would concern me as a maintainer:
1. When you use split(/ /) are you saying that you know that the data will always be separated by exactly one space character or did you really mean to use split(/ +/) or split(/\s+/) or preferably split(' ') instead?
2. Why are you using map twice when you only need to use it once? For example:
return map split( / /, uc, 2 ), @somearray;
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