Re^2: Can you read a false value from a file?

Ah, so a string with a trailing newline will never be false, but it's possible that the last line of the file won't have the trailing newline. ~~So, without the defined( ... ) I might fail to process the last line~~ But even then, my $line = <FH> will still return true.

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Re^3: Can you read a false value from a file? by converter (Priest) on Feb 11, 2006 at 10:06 UTC
When you write `while ($scalar = <FILEHANDLE>) { ... }`, perl takes care of the test for definedness for you: `$ perl -MO=Deparse -e 'open $fh,"foo.txt"; while (my $line = <$fh>) { +print $line }' open $fh, 'foo.txt'; while (defined(my $line = <$fh>)) { print $line; } -e syntax OK` [download] converter	[reply] [d/l]
Re^3: Can you read a false value from a file? by ikegami (Patriarch) on Feb 11, 2006 at 09:58 UTC
Did you only read the last line of my post? I said the opposite, and included a code sample proving the opposite. Even without the newline, it won't fail.	[reply]
Re^4: Can you read a false value from a file? by grantm (Parson) on Feb 11, 2006 at 10:03 UTC
No, I misread the whole thing - sorry. Is it documented anywhere that `while (my $line = <FH>)` is equivalent to `while (defined(my $line = <FH>))`	[reply] [d/l] [select]
Re^5: Can you read a false value from a file? by bart (Canon) on Feb 11, 2006 at 13:42 UTC
But it used not to be that way, the implicit defined got added. In fact, your description is precisely why it got changed. Even more: if one of the files in the middle of a files list ended wit a bare "0", the rest of the files were just dropped.	[reply]