Ouch. No. Please, not:

@FileList = `ls -1`;
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• The -1 isn't needed if the output is not a terminal.
• This fails on filenames that contain newlines
• This fails on non-Unix systems.
• This fails if ls is not what you think it is.
• This doesn't list the files that begin with dot, unless you're root.
• You didn't chomp the list, so the names still end in newline.

Much simpler:

@FileList = <*>;
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Or, to get files that begin with dot:

@FileList = <.* *>;
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-- Randal L. Schwartz, Perl hacker