Re: How to launch kdiff3 to compare 2 neighbouring windows in VIM

Hi huangyingw!

On Sa, 13 Sep 2014, huangyingw wrote:

> When I used variable,
> [code]
>
> nnoremap <leader>1 :let file1=expand("%:p")<CR>
>
> function! CompareTwoFiles()
> execute '!kdiff3' file1 expand("%:p")
> endfunc
>
> nnoremap <leader>2 :call CompareTwoFiles()<cr>
>
> [/code]
> I got following error
> [code]
> Error detected while processing function CompareTwoFiles:
> line 1:
> E121: Undefined variable: file1
> E15: Invalid expression: file1 expand("%:p")
> [/code]

That is because file1 is seen as function local variable, while you want
to access the global variable file1, so use g:file1

Note, you probably want to test, whether file1 is empty (happens for a
new empty buffer).

Best,
Christian
--
Die Menschen von heute wünschen das Leben von übermorgen zu den
Preisen von vorgestern.
-- Tennessee Williams

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