Reload .vimrc in Vim without restart

Question

It bothers me when I wrote something into .vimrc and I have to close it first and open to get my changes be applied. Is there a way of reload .vimrc in Vim without closing it?

E.g. I've added set nu to ~/.vimrc and I want line numbers to appear for all my windows and buffers.

Answer 1

:source ~/.vimrc

Run that from inside vim, that will apply your .vimrc

Alternately

:source $MYVIMRC

Answer 2

Here's one for posterity. Add the following to your .vimrc:

map <leader>vimrc :tabe ~/.vim/.vimrc<cr>
autocmd bufwritepost .vimrc source $MYVIMRC

The first line means you can open your vimrc from any vim buffer by typing your leader, then writing "vimrc." For example, my leader is set to comma, so if I'm in edit mode and I type ",vimrc" it opens my vimrc in a new tab.

The second line automatically sources the changes to your vimrc when you save and close it. It's magic.