file descriptor
Perl
The little number the "operating system" uses to keep track of which opened "file" you're talking about. Perl hides the file descriptor inside a "standard I/O" stream and then attaches the stream to a "filehandle".
The little number the "operating system" uses to keep track of which opened "file" you're talking about. Perl hides the file descriptor inside a "standard I/O" stream and then attaches the stream to a "filehandle".