Is this language really necessary? I’m sure I’ve used these words myself,
but they’re certainly not appropriate in a public discussion.
I do not know the answer to your question, it really seems more like a
regexp question, rather than a problem with Perl. I hope someone who knows
the answer can respond, hopefully in more civil language.
Is this language really necessary? I’m sure I’ve used these words myself,
but they’re certainly not appropriate in a public discussion.
We don’t get the usenet “in color” around here, so I guess that this
languages reflected the fuming hot in frustration state of the OP. I
guess that you could measure the quality of a design and its
documentations by the inverse of the number of posts related to it
using such language.
When we’ll have video-usenet, I guess language will be more proper,
but we’ll be seeing keyboads and screens flying out of the windows
more often.
I do not know the answer to your question, it really seems more like a
regexp question, rather than a problem with Perl. I hope someone who knows
the answer can respond, hopefully in more civil language.
Even with sed I find difficult to do that.
On the other hand, with emacs it’s quite simple:
M-x replace-string RET C-q C-j C-q C-j RET C-q C-j RET
···
– Pascal_Bourguignon . * * . * .* . http://www.informatimago.com/ . * . .*
There is no worse tyranny than to force * . . /\ ( . *
a man to pay for what he does not . . / .\ . * .
want merely because you think it .. / * \ . .
would be good for him. – Robert Heinlein . / o \ . http://www.theadvocates.org/ * ‘’’||’’’ .
SCO Spam-magnet: postmaster@sco.com ******************
If you want to remove blank lines, then sed ‘/^$/d’ will do. If, on
the other hand, you actually want to compress pairs of newlines into
single newlines (as I think the specification may have said), something
a bit more complicated is required. I think that sed 'N;P;/\n$/d;D’
will do it.
If you want to remove blank lines, then sed ‘/^$/d’ will do. If, on
the other hand, you actually want to compress pairs of newlines into
single newlines (as I think the specification may have said), something
a bit more complicated is required. I think that sed 'N;P;/\n$/d;D’
will do it.
If you want to use Perl or Ruby, these are equivalent to the first sed
solution:
The equivalent doesn’t work in Perl, probably because -p puts the
implicit print statement in a “continue” block, which gets executed
before the loop is restarted by “next”.
If you’re doing this on a huge file and care about speed, sed will
be slightly faster than Perl and Perl will blow Ruby away. Because
I was curious, I tried writing it in C to see if I could beat sed.
My first attempt was slightly slower (!), but my second attempt ran
much faster than sed; unfortunately, it also took 30 minutes and
34 lines.