NERDTree toggling and keyboard mapping

Question

I have this line in my .vimrc:

nmap <silent> <Leader>p :NERDTreeToggle<CR>

So what is the hotkey for toggling NERDTree?

How do I remap it to CTRL-D?

what is the difference between nmap, map, nnoremap, inoremap, etc?

Answer 1

to remap in normal mode use

nmap <silent> <C-D> :NERDTreeToggle<CR>

nmap means map in normal mode
imap means map in insert mode

the nore part in nnoremap and its friends prevent expanding the mapping recursively. For example, i use to also hide search string so, in my vimrc I have

nnoremap <silent> <C-L> :noh<CR><C-L>

Without the nore, the above mapping will loop.