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A Little History on 0D0Aby jeffa (Bishop) |
on Mar 31, 2001 at 22:46 UTC ( [id://68687]=note: print w/replies, xml ) | Need Help?? |
As Trimbach said, you should not have a problem. But why
is there such a concern with the compatiliblity between
record seperators across platforms in the first place?
Why so much trouble?
Time for a little history:
Blame it on the typewriters - better yet, that lever or button on the right side of them. The one used to start typing on the next line. When you activate it, it causes
In this Baudot code, two special characters were designated for a Carriage Return(0x02) and a Line Feed(0x08). Baudot code went the way of the dinosaur for reasons outside the scope of this discussion, but the CR and LF characters were adopted by ASCII with different values: Why were they adopted? For printers of course. The concept of the tty was split into two - a monitor and a printer. At this point, it was up to the various operating systems to implement their actual use. Oops. UPDATE: Disregard that last table, kept only for historical purposes. Here is a better table, one that shows how the three different operatiing systems interpret a logical newline (ps, thanks Mr. Stein =] )
This only causes problems when you transfer ASCII files around different operating systems as binary data, in which case you should use binmode - or when you are programming with sockets, in which case you will need to set $/ to '\015\012' or just use the exported globals $CRLF and CRLF() from the Socket or IO::Socket modules. So, the next time you find yourself cursing this confusion, just take a look at this typewriter history tree and remember that we are only human, except arhuman. :) Jeff
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