Re: How to append lines when iterating over a range.

Ben,

Hopefully this doesn't get sent twice, but it seems that my last response was lost in the ether.

I don't think that those functions help.  Here is a simplified version of my problem.

Say we want to convert these lines:

line1

line2

line3

Into this:

line1

some

appended

lines

line2

some

appended

lines

line3

some

appended

lines

My first attempt at the function looks like this:

function! Example()

   call append(line('.'), ["some", "appended", "lines"])

endfunction

The problem is that this won't work for ranges.

If you try this command:

1,3call Example()

You get this output:

line1

some

some

some

appended

lines

appended

lines

appended

lines

line2

line3

The problem is that range iterates over line numbers, but I'm changing the content of those lines.

The solution that I came up with that works with ranges is this:

function! Example() range

   let num_lines = a:lastline - a:firstline + 1

   for linenum in range(a:firstline, a:firstline + (num_lines - 1) * 4, 4)

      call append(linenum, ["some", "appended", "lines"])

   endfor

endfunction

It works, but is by no means elegant.  I have to specify the number my start and end lines and how much to stride by.

This is why using substitute, as John suggests, is probably the best option, assuming that things don't get too complicated.

Hope this explains things,

Eric

On Thu, Aug 8, 2013 at 8:21 AM, Ben Fritz <fritzophrenic@gmail.com> wrote:

On Wednesday, August 7, 2013 8:58:55 PM UTC-5, Eric Siegel wrote:
> My coworker said that in emacs he's able to get the current cursor position.  In vim we can get the current line '.', but if we could get the cursor position as the range iterates, we wouldn't have to worry about the number of lines appended.
>

I'm not sure whether you still need the answer to this question, but:

:help getpos()

Also:

:help line()
:help col()
:help virtcol()

Any of these functions can return information about the cursor position.

Maybe you already know about these and I misunderstand your question? You mentioned using '.' to get the current line, by which you might mean line('.'), but if that's the case I'm not sure what your problem is because that will give you the cursor line.

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