"This is my rifle. There are many like it, but this one is mine." - Rifleman’s Creed

There are a thousand ways to grep over files. Most developers I have observed keep a separate command line open just for searching. A few use an IDE that has file search built in. Personally, I use a couple of Vim macros.

In Vim, you can execute a cross-file search with something like :vimgrep /dostuff()/j ../**/*.c. I don’t know about you, but the first time I saw that syntax my brain simply refused.

Instead, I have the following in my .vimrc file:

" opens search results in a window w/ links and highlight the matches
command! -nargs=+ Grep execute 'silent grep! -I -r -n --exclude *.{json,pyc} . -e <args>' | copen | execute 'silent /<args>'
" shift-control-* Greps for the word under the cursor
:nmap <leader>g :Grep <c-r>=expand("<cword>")<cr><cr>

The first command is just a simple alias for the above mentioned native grep. Like all custom commands, it must start with a capital letter (to differentiate it from native commands). You simply type :Grep foobar and it will search in your current directory through all file extensions (except .json and .pyc -- you can add more to the blacklist).

It also displays the results in a nice little buffer window, which you can navigate through with normal HJKL keys, and open matches in the main editor window.

The second line is a key mapping that will grep for the word currently under the cursor. You can just navigate to a word and hit Leader-g to issue the grep command.