vim - add nerdtree command -

i wanto add command in nodetree.

for example if press 'c' has execute 'o' command in nnerdtree , :as command of alternateplugin in vim.

i tried tries nmap in vimrc didn't managed it

this mapping should work execute both commands:

nmap c o <bar> :as<cr> 

<bar> used separate multiple commands, allowing multiple commands on same line. see :help :\bar details.

i suggest avoid remapping c because c{motion} rather useful built-in vim command (see :help c details).