Mastering Modern Perl: Writing Efficient and Maintainable Code/

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File Manipulation

File Manipulation

Let’s explore other ways of manipulating files besides reading and writing.

We'll cover the following...

Besides reading and writing files, we can also manipulate them as we would directly from a command line or a file manager.

File test operators

The file test operators, collectively called the -X operators, examine file and directory attributes. To test that a file exists, try this:

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main.pl
some_file
my $filename = 'some_file';
#...
say 'Present!' if -e $filename;

  • The -e operator has a single operand, either the name of a file or a handle to a file or directory. If the file or directory exists, the expression will evaluate to a true value. perldoc -f -X ...