I have an array of files. @tmparray I want to sort by modified time. So I'm using the code below 
@tmparray = sort { -M "$b" <=> -M "$a" } (@tmparray);

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It works fine majority of the time. However, if the file has been removed but the name still exists in @tmparray I get the error below 
Use of uninitialized value in numeric comparison (<=>) at ...

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How can I test if the file exist before getting modification time and remove the entry from @tmparray

In reply to Sort by -M by roperl

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