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Perl Programming/Keywords/-e
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Perl -d -f Keywords
The -e keyword
-e is a file test that tests, if the file exists.
It takes one argument, either a FILENAME, a FILEHANDLE, or a DIRHANDLE to test the associated file to see, if something is true about it. If the argument is omitted, it tests $_. -e returns 1 for true and an empty string for false. If the file doesn't exist or can't be examined, it returns undef and sets $! (errno).
Syntax
-e DIRHANDLE
-e EXPRESSION
-e FILEHANDLE
-e FILENAME
-e
Perl -d -f Keywords
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