On 4/9/12 Mon Apr 9, 2012 12:22 PM, "Tiago Hori" <tiago.h...@gmail.com> scribbled:
> Hey Jim, > > Makes perfect sense now. Thanks. > > Just so I make sure I understand it correctly: So every time I use a while > (<FILEHANDLE>) loop each line of input from the file gets assigned to $_ in > each iteration of the loop? Almost. <> is an operator. Each time <FILEHANDLE> is evaluated, a line is read from the file and assigned to the $_ variable. This is regardless of whether or not <FILEHANDLE> appears in the condition of a while statement. >From 'perldoc perlop' (search for "I/O Operators"): "In scalar context, evaluating a filehandle in angle brackets yields the next line from that file (the newline, if any, included), or "undef" at end-of-file or on error. When $/ is set to "undef" (sometimes known as file-slurp mode) and the file is empty, it returns '' the first time, followed by "undef" subsequently." -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
