Re: [Bug-ed] info ed-File

[kalle]

hello,

1.
> kalle wrote:
>> -\M, where M is a number: I don't understand the message because of the
>> term "backreference expression". If I give it in the REPLACEMENT it
>> gives me 'M'.
> 
> Did you define the corresponding subexpression in RE?

No, I didn't. But I also didn't understand the term "backreference
expression". It should be explained in that part of the info-ed file.

2.

>> Instead, the order s\PATTERN takes away PATTERN, which is not mentioned
>> in the  info ed-File.
>> -the '%' REPLACEMENT doesn't seem to work for me too.
>>
>> my ed-version is 1.9-2
> 
> These bugs have been fixed in the latest version of GNU ed (1.14.2). You
> can download it from http://ftpmirror.gnu.org/ed/ed-1.14.2.tar.lz
here I see following problems:
i)I didn't understand, that s\PATTERN is a special case of
s/RE/REPLACEMENT/, namely by not writing /REPLACEMENT/, so that /RE/ is
deleted. This as other special cases should be explained in the
explanation of `s’.

ii)I don't know why I failed on this, but now % works fine for me,
without having updated my version.

iii)I don't understand why you say,these bugs had been fixed in the
latest version, as it seems to me that I messed it up and not the program.

iv) as as newbie it is not easy at all for me handling with a
tar.lz-file. I had to research,what the .lz-suffix means,which program
to install, how to use tar and so on. Furthermore, I still don't know
how to deal with binary programs when not installing them through
packaging software. Is it really necessary to point out the newest
version? To .tar.lz the files?

3.Since I had a lot of difficulties of understanding the explanations
around the `s‘-command, I tried to figure it out in practice. This was
sometimes quite confusing, because I also wasn't experienced using ed.
Therefore, I think it is quite important to document this command well,
especially:
i)in the explanation of the `g' in s/RE/REPLACEMENT/g, it is said that
"It is an error, of no […]" Why? If N is big enough?

ii)to make a statement to the relation between solely `/RE/' as to jump
to the line and /RE/ in `s/RE/REPLACEMENT/': what does the term search
mean? I had to figure it out by experimenting. That for I also had
problems understanding the `r' in `sr'. I think that for "to be used
instead of the that of the last substitution" "Regular Expression"
should be inserted between "the" and "that".That `//' in also matching
the `/RE/' in an `s'-command.

greetings,
kalle