Hi Perlers,
On 30 Sep 2004 10:11:29 +0100, Jose Alves de Castro <[EMAIL PROTECTED]> wrote:
On Wed, 2004-09-29 at 21:25, JupiterHost.Net wrote:
I would like the output in the following format object1<...tab....>Description1 object2<...tab....>Description2 object3<...tab....>Description3
perl -lne 'BEGIN{$/="\n\n";}s/\n/\t/;print' FILENAME
perl -l -00pe's/\n/\t/' FILENAME
That's pretty slick you guys, he's sure to get an A+ ;)
If your teacher requires the quotes to be removed:
What if the teacher requires an explanation? O:-)
It is my opinion that code should be explained, at least in this list. You're trying to teach people how to fish (and maybe swim). Giving them fish is good, of course, but tell them how you got it :-)
That said, nice code :-)
perl -l -00pe's/\n/\t/;s/\"//g;' FILENAME
I'll give it a try.
First, it's good to know that the two Perl special variables '$/' and '$\' are the input separator and output separator. By Default, they will be $/ = \n (newline character) and $\ = undef (nothing. No output separator).
So far so good. :-)
Now, on the command line, the '-0' option will set the input separator ($/). In the above example, it's setting $/ = 0.
Wrong.
Also, in the example, the '-l' will do two things. First, it will automatically chomp() whatever's in '$/', and then it will set the output separator to be whatever the input separator will be. So, specific to our example, first '-l' sets '$\' (output separator) to whatever '$/' is (at this point, it's \n, or a newline). Then, the '-0' switch is setting the $/ = 0 ( or null, or nothing!).
perldoc perlrun [snip] -0[octal/hexadecimal] specifies the input record separator ($/) as an octal or hexadecimal number. If there are no digits, the null character is the separator. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Other switches may precede or follow the digits. For example, if you have a version of find which can print filenames terminated by the null character, you can say this:
find . -name '*.orig' -print0 | perl -n0e unlink
The special value 00 will cause Perl to slurp files in paragraph mode.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The value 0777 will cause Perl to slurp files whole because there is no
legal byte with that value.So using the switch -00 is the same as setting the input record separator to paragraph mode or $/ = '';
John -- use Perl; program fulfillment
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