One Quickie

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Make emacs indent code with spaces instead of tabs (emacs->General)

Personally, I prefer emacs' default indentation with a mixture of tabs and spaces. If you're working on a project or for a client that requires indentation with spaces, add this to your .emacs file. This will make spaces the indent character, and use 4 spaces per indent level, for C, C++, and Objective C:

(setq c-mode-hook
    (function (lambda ()
                (setq indent-tabs-mode nil)
                (setq c-indent-level 4))))
(setq objc-mode-hook
    (function (lambda ()
                (setq indent-tabs-mode nil)
                (setq c-indent-level 4))))
(setq c++-mode-hook
    (function (lambda ()
                (setq indent-tabs-mode nil)
                (setq c-indent-level 4))))