Re^2: Best way to compare range of characters in two text files

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Re^3: Best way to compare range of characters in two text files by AnomalousMonk (Archbishop) on Jul 12, 2018 at 17:26 UTC
Somebody needs to scramble for `perldoc -f read` because read FILEHANDLE,SCALAR,LENGTH,OFFSET ... Returns the number of characters actually read, 0 at end of file, or undef if there was an error* (in the latter case $! is also set). ...* [emphases added] In this particular case, you're probably not going to be sitting at the end of the file just after opening it (unless the file's empty) and only one read is ever done, but a statement like `read($fh1, my $rec1, $length, $offset) or die("Can't read $file1");` will die at the end of the file, and that's not proper handling of an error condition. (It would have been nice to have had `$!` in the `die` message, too. Some study of the purpose of the `OFFSET` parameter might also be profitable.) Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
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Re^3: Best way to compare range of characters in two text files by Anonymous Monk on Jul 12, 2018 at 17:26 UTC
Just because it's possible to write Pascal in Perl doesn't mean it's advisable.	[reply]
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