On 08/04/2011 03:16 AM, ranou...@gmx.com wrote:
1) If I understand right, :append is used this way
:append
line1
line2
.
and . means end, in a similar way as
cat<<EOF
line1
line2
EOF
What could I do if I want to insert a line containing only a point.
I don't really need this but I'm curious ;-)
As best I can tell, you can't. I suppose, if you were really
interested and forced to use :a, then I'd enter one extra
character and then :s it away:
:a
line1
.!
line3
.
:-2s/.$
(the last line goes back 2 lines and removes the last character,
i.e. the "!". Slightly confusing as it uses "." to mean something
other than the period in question). An alternative is to use
:put (see below)
2) With the cat example above, it's possible to write things like
cat<<EOF
$var
line2
EOF
Has vim something similar (by default not it seems)?
And is there a better solution than
:execute "normal o" . var . "\nline2"
to handle this case?
For such an example, I'd use a combination of :put with the
expression register, which takes a list:
:put=[var, 'line2', '.', 'that was a line with 1 period']
which pretty cleanly seems to do what you want for both cases.
3) I've just read in the documentation that if 'cpo' option doesn't
contain C,
:append
a
\b
.
would write
ab
because the \ is understood as line continuation.
I have cpo=aABceFs (the default configuration, on my computer)
But I obtain
a
\b
(actually C or not does not seem to change anything, do I miss
something?)
I believe this only takes place when you :source the file, not
entering them interactively. There's a sideways mention of this at
:help line-continuation
4) and a last one about ex use
It seems that one uses ex in the following way
ex file<<EOF
%s/pattern/replace/g
w
EOF
a) In this case, I do not write wq or x at the end but w and it seems
to work. Is it cleaner (necessary ?) to add :q as last line, or is it
implicitely added.
I don't know about "necessary", but I tend to prefer explicit
commands. You can either use
wq
or
x
instead of just "w"
b) Has ex an option such as -s (meaning string) so that a sh user
could write the previous example this way
sh -s '%s/pattern/replace/g | w' file
(bash or zsh users can already use<<< for this, but I need sh in my
case). What I don't like about ex ...<<EOF, is that it looks weird in
an indented script (the here document must be stuck to the left margin it
seems)
I'm not sure I follow this example...you never invoke
vim/vi/ed/ex to edit the stream. And for the change in question,
unless your "pattern" includes vim-specific tokens, I'd be
tempted just to use sed.
-tim
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