.vimrc

set splitbelow
nnoremap <F4> :set hlsearch! nohlsearch?<CR>
imap <F4> <C-O><F4>

nnoremap <F2> :let @/="qoXouQoz"<CR>:set invpaste paste?<CR>
set pastetoggle=<F2>
nnoremap <silent> <F3> :let @/ .= '\\|\<'.expand('<cword>').'\>'<cr>n
nnoremap <buffer> <F5> :w<cr>:exec '!/usr/bin/python3' shellescape(@%, 1)<cr>
syntax on

" END/Home work as expected

nnoremap 0 $
nnoremap 9 0
inoremap <C-A> <Home>
inoremap <C-E> <End>

" Indentation with TAB/S-TAB

set tabstop=4
set softtabstop=4
set shiftwidth=4
set expandtab
set autoindent
nnoremap <Tab> >>_
nnoremap <S-Tab> <<_
inoremap <S-Tab> <C-D>
vnoremap <Tab> >gv
vnoremap <S-Tab> <gv

" Move one line up/down with CTRL+ARROW
noremap <C-up> :call feedkeys( line('.')==1 ? '' : 'ddkP' )<CR>
noremap <C-down> ddp

" Tab open/close with CTRL T/D
noremap <C-T> :Tex<CR>
noremap <C-D> :wincmd c<CR>

" Selection with arrows
nmap <S-Up> v<Up>
nmap <S-Down> v<Down>
nmap <S-Left> v<Left>
nmap <S-Right> v<Right>
vmap <S-Up> <Up>
vmap <S-Down> <Down>
vmap <S-Left> <Left>
vmap <S-Right> <Right>
imap <S-Up> <Esc>v<Up>
imap <S-Down> <Esc>v<Down>
imap <S-Left> <Esc>v<Left>
imap <S-Right> <Esc>v<Right>

" CTRL+Z is undo
nnoremap <c-z> :u<CR>
inoremap <c-z> <c-o>:u<CR>

set showcmd
set showmatch
set showmode
set cursorline
set nolazyredraw
set encoding=utf8

"Toggle comments with CTRL+/

let s:comment_map = {
    \   "c": '\/\/',
    \   "cpp": '\/\/',
    \   "go": '\/\/',
    \   "java": '\/\/',
    \   "javascript": '\/\/',
    \   "lua": '--',
    \   "scala": '\/\/',
    \   "php": '\/\/',
    \   "python": '#',
    \   "ruby": '#',
    \   "rust": '\/\/',
    \   "sh": '#',
    \   "desktop": '#',
    \   "fstab": '#',
    \   "conf": '#',
    \   "profile": '#',
    \   "bashrc": '#',
    \   "bash_profile": '#',
    \   "js": '\/\/',
    \   "vim": '"',
    \   "tex": '%',
    \ }

function! ToggleComment()
    if has_key(s:comment_map, &filetype)
        let comment_leader = s:comment_map[&filetype]
        if getline('.') =~ '^\s*$'
            " Skip empty line
            return
        endif
        if getline('.') =~ '^\s*' . comment_leader
            " Uncomment the line
            execute 'silent s/\v\s*\zs' . comment_leader . '\s*\ze//'
        else
            " Comment the line
            execute 'silent s/\v^(\s*)/\1' . comment_leader . ' /'
        endif
    else
        echo "No comment leader found for filetype"
    endif
endfunction


nnoremap <C-_> :call ToggleComment()<CR>
vnoremap <C-_> :call ToggleComment()<CR>

" Run selected code on F6

function s:exec_on_term(lnum1, lnum2)
  " get terminal buffer
  let g:terminal_buffer = get(g:, 'terminal_buffer', -1)
  " open new terminal if it doesn't exist
  if g:terminal_buffer == -1 || !bufexists(g:terminal_buffer)
    terminal /usr/local/bin/ipython --no-autoindent
    let g:terminal_buffer = bufnr('')
    wincmd p
  " split a new window if terminal buffer hidden
  elseif bufwinnr(g:terminal_buffer) == -1
    exec 'sbuffer ' . g:terminal_buffer
    wincmd p
  endif
  " join lines with "\<cr>", note the extra "\<cr>" for last line
  " send joined lines to terminal.
  call term_sendkeys(g:terminal_buffer,
        \ join(getline(a:lnum1, a:lnum2)+["",""], "\<cr>"))
endfunction

command! -range ExecOnTerm call s:exec_on_term(<line1>, <line2>)
nnoremap <F6> :ExecOnTerm<cr>
vnoremap <F6> :ExecOnTerm<cr>
" Exit terminal on ESC
tnoremap <ESC> <C-w>:q!<CR>

vimrc.md

Vim Modifications:

1. End and Home keys work as expected:
2. F2 = paste mode
3. F3 = search word under cursor
4. F4 = Highlight mode
5. F5 = run in python
6. F6 = Run selection in ipython
7. Tab and Shift+Tab do indentations
8. Ctrl+Z = undo
9. Ctrl+Up/Ctrl+Down = move line up or down
10. Ctrl+/ = Comment/Uncomment
11. Ctrl+T/D = open/close a tab

Get this vim config with:

curl -L http://goren.ml/vim > ~/.vimrc