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My question comes from this two commands I added on my _vimrc file:
nnoremap <C-[> :set columns+=1<CR>
nnoremap <C-]> :set lines+=1<CR>
As is known, it will resize your gvim (I am using gvim on windows) with one more column when you hit Ctrl-[, and one more line when you hit Ctrl-]. That is really cool since you can achieve that resizement as though you are using your mouse.
I wonder if I can map those two command with only one key to make it more comfortable.
You can do this with \| on unix in the .vimrc file, or with <bar> on windows in the _vimrc file.
e.g.
" unix
nnoremap <C-[> :set columns+=1 \| lines+=1<CR>
" windows
nnoremap <C-[> :set columns+=1 <bar> lines+=1<CR>
See the documentation : :help :bar
| is good, but that doesn't work in _vimrc file. It would be ok if you replace it with <bar> (as the answer in stackoverflow suggest)
NB: You may find that your ~/.vimrc doesn't support mapping |, or \|. In these cases, try using <bar> instead.
\| for nnoremap, it would only work if columns+=1 was a command, but it's actually a setting. set lines+=1 columns+=1 would be correct (changing multiple settings from the same :set command.
I would recommend you to use for example <C-P>, since <C-[> is the same as <Esc> and <C-]> is used to jump to a definition of the keyword under the cursor.
You can just do this:
nnoremap <C-P> <Esc>:set columns+=1 lines+=1<CR>
The another way is to use the command separator |, but you have to escape it or use <Bar> to use it as an argument for the nnoremap command, otherwise it would be recognized as command separator in the vimrc file, not in the mapping.
nnoremap <C-P> <Esc>:set columns+=1 \| set lines+=1<CR>
So when you press <C-P>, this command is executed:
set columns+=1 | set lines+=1
<C-p> is used to autocomplete text in vim, which is a built-in utility. I haved used a <M-p> instead. But anyway, the<Esc> in front of the command is a very good addition.
<C-P> in insert mode to autocomplete text.
I was mapping two commands to one F-key to execute 2 plugin commands and none of the above worked for me.
The only option that worked for me was with to <CR>:
nnoremap <F10> :Doctest <CR> :lwindow<CR>
:Doctest typically don't accept | as a separator (they take it as an argument.) See :help :bar which explains a lot of that. One solution is to use :execute: nnoremap <F10> :execute 'Doctest' \| lwindow<CR>. But yeah using two separate <CR>s would work for sure.
<C-[>is the same as<ESC>. It's a really bad idea to mess with that. You might want to choose a different key combination.