# vim - config and usage

###### tags: `linux` `vim`

# turning off auto indent
:set paste

# turning of auto indent
:set nopaste

# map F3 key to turning of/off paste mode
:set pastetoggle=<F3>

# seto indenting to four spaces
:set shiftwidth=4

# add comment 
# show line number first, 
# then use the line number to specify line range to comment out the lines. 
# for example comment out from line 10 to 20
: set number
:10,20s/^/#/

configure ~/.vimrc

# enable / disable auto indent
filetype indent off

# if you forget to open a file that you make changes to, and can not save 
# ":w!!" will prompt for sudo perms and write it out.
cmap w!! w !sudo tee % > /dev/null

:w !sudo tee %

### change color schema

list available vim color in MAC OS
Yu-Jung-MacBook-Pro:~ yu-jungcheng$ ls -l /usr/share/vim/vim80/colors/
total 0
-rw-r--r--  1 root  wheel  2904  7 Aug 09:56 README.txt
-rw-r--r--  1 root  wheel  2476  7 Aug 09:56 blue.vim
-rw-r--r--  1 root  wheel  2990  7 Aug 09:56 darkblue.vim
-rw-r--r--  1 root  wheel   548  7 Aug 09:56 default.vim
-rw-r--r--  1 root  wheel  2522  7 Aug 09:56 delek.vim
-rw-r--r--  1 root  wheel  2812  7 Aug 09:56 desert.vim
-rw-r--r--  1 root  wheel  1666  7 Aug 09:56 elflord.vim
-rw-r--r--  1 root  wheel  2452  7 Aug 09:56 evening.vim
-rw-r--r--  1 root  wheel  1958  7 Aug 09:56 industry.vim
-rw-r--r--  1 root  wheel  3555  7 Aug 09:56 koehler.vim
-rw-r--r--  1 root  wheel  2460  7 Aug 09:56 morning.vim
-rw-r--r--  1 root  wheel  2006  7 Aug 09:56 murphy.vim
-rw-r--r--  1 root  wheel  1037  7 Aug 09:56 pablo.vim
-rw-r--r--  1 root  wheel  2673  7 Aug 09:56 peachpuff.vim
-rw-r--r--  1 root  wheel  1393  7 Aug 09:56 ron.vim
-rw-r--r--  1 root  wheel  2720  7 Aug 09:56 shine.vim
-rw-r--r--  1 root  wheel  2445  7 Aug 09:56 slate.vim
-rw-r--r--  1 root  wheel  1629  7 Aug 09:56 torte.vim
-rw-r--r--  1 root  wheel  1840  7 Aug 09:56 zellner.vim

# to change color setting permentally, 
# edit file in ~/.vimrc (create the file if not exist)
colo murphy
colo delek
colo desert

### move cursor

In normal mode (press ESC)
# jump to end of file
:$
G

# go to first line
:1
gg
1G
1 gg

# move to end of a word, or number of word (# is number)
e
#e

# move forward to begining of a word or or number of word (# is number)
w
W
#b

# move to end of line
$

# move to beginning of line (number zero)
0

# jump forward a line or number of lines (# is number)
j
#j

# jump backward a line or number of lines (# is number)
k
#k

# jump to top of screen
H

# jump to middle of screen
M

# jump to bottom of screen
L

### search and replace string

In vim editor, some basic tips for searching and replacing string in content.

# find 'search' in all lines and replace it with 'replace'
:%s/search/replace/g

# find 'search' in current line only and replace it with 'replace'
:s/search/replace/g

# find 'search' in all lines and replace it with 'replace' and ask for confirmation first
:%s/search/replace/gc

# change only whole words exactly matching 'search' to 'replace' and ask for confirmation.
:%s/\<search\>/replace/gc

# change each 'search' (case insensitive) to 'replace' and ask for confirmation
:%s/search/replace/gci
:%s/search\c/replace/gc

# change each 'search' (case sensitive) to 'replace' and ask for confirmation
:%s/search/replace/gcI
:%s/search\C/replace/gc

!!!
g - global
c - confirm
i - case insensitive
I - case sensitive