Ctrl+Space for omni and keyword completion in vim

Question

I Want to use Ctrl+Space for omni-completion (and keyword completion if there is no omni-completion) in vim. I\'ve tried this which I found somewhere o

Answer 1

Try this:

inoremap   pumvisible() \|\| &omnifunc == '' ?
\ "\C-n>" :
\ "\C-x>\C-o>=pumvisible() ?" .
\ "\"\\c-n>\\c-p>\\c-n>\" :" .
\ "\" \\bs>\\C-n>\"\"
imap