Vim Replacement Lookup

# #一, substitution and revocation of characters (undo action)
	# # #1. Replace and revoke (undo) commands
	Both the Replace and undo commands are for normal mode operations
	Command | Description
	-----|-----
	' R ' +< letters to be replaced > | Replace the letter that contains the cursor with the specified letter
	' R ' | Continuous replacement until ' ESC ' is pressed
	' CC ' | Replace the entire row, which deletes the row of the cursor and enters insert mode
	' CW ' | Replace a word, delete a word, and enter insert mode
	' C ' (uppercase) | Replace cursor to end of line
	`~` | Reverses the case of a cursor in the same letter
	' U ' {n} | Undo One or N operations
	' U ' (uppercase) | Undo all changes to the current line
	' Ctrl+r ' | Redo, that is, undo undo operation
	To open a file for editing:
	```
	$ vim practice_2
	# Enter the following text
	Www.shiyanlou.com
	```
	Then do the following:
	-Enter ' 11G ' and jump to line 11
	-Enter FA to jump to the first ' a ' character
	-Enter ' r ', and input b,a character is replaced by B character (practical)
	-Enter ' R ' to replace character, enter new string, press ESC to return to normal mode (practical)
	-Enter ' CC ' to replace whole line characters, enter new string, press ESC to return to normal mode after entering
	-Enter ' CW ' to replace an English text (word), press ESC to return to normal mode (useful)
	-Enter ' ~ ' to flip the case of the character where the cursor is located
	-Input ' C ' is replaced with the end of the line, that is, the word will be replaced when the cursor is in place, press ESC to return to normal mode after entering
	-Enter ' U ' to undo last operation
	! [] (Https://dn-anything-about-doc.qbox.me/md041718vim5+.gif)
	# #二, Fast indent
	# # #1. Use commands to quickly adjust indent operations
	This section learns how to indent quickly in vim and indent operations are effective in normal mode
	Open a file for editing
	```
	$ VIM Protocols
	```
	-Input ' 15G ' in normal mode, jump to 15 lines
	-Input ' >> ' line is indented to the right in normal mode (used to format code super cool)
	-In normal mode, enter ' the whole line to the left to rewind
	-Normal mode input ': ' Enter command line mode to set the ' Shiftwidth ' value to control the number of characters for indentation and fallback
	# # #2. shiftwidth command
	The ' shiftwidth ' command refers to the indentation generated by the previous section ' >> ' command (can be simply written ' SW ')
	Normal mode Enter ': ' Enter command line mode to set the ' Shiftwidth ' value to control the number of characters for indentation and fallback
	Get the current set value
	: Set shiftwidth?
	```
	Set indent to 10 characters
	: Set shiftwidth=10
	```
	Enter ' ESC ' back into normal mode and try ' >> ' again to see if the indent is changing
	# # #3. Adjust text position
	Command line mode enter ': CE ' (center) command to center the contents of the bank
	```
	: CE
	```
	command-line mode, enter ': ri ' command to make our text on the right
	```
	: RI
	```
	Command line mode, enter: ' Le ' (left) command to leave the contents of the bank
	```
	: le
	```
	! [] (Https://dn-anything-about-doc.qbox.me/md041718vim6+.gif)
	# #三, find
	# # #1. Quick Find
	Enter '/' in normal mode and then type the string you want to find and press ENTER to find it.
	'? ' and '/' function the same, just '? ' is up and '/' is looking down.
	After entering the search, enter ' n ' and ' n ' to continue to find
	' n ' means continue lookup, ' n ' reverse lookup
	# # #2. Quick Find Exercises
	Use VIM to open a file for editing
	```
	$ VIM Protocols
	```
	-Enter '/icmp ' in normal mode to find the string ICMP
	-Enter ' n ' in normal mode to find the next ICMP
	-Input in normal mode '? TCP ' Looks up string TCP
	-Enter ' N ' in normal mode to find the previous TCP
	# # #3. Advanced Find
	-Enter ' \* ' in normal mode to find the word where the cursor is located
	-Normal mode input ' \# ' ibid, but ' \* ' is forward (up) to find, \ #则是向后 (next) find
	-Enter ' g\* ' with ' \* ' in normal mode, but partially conform to the word
	-Enter ' g\# ' with ' \# ' in normal mode, but partially conform to the word
	Search for ' n ' above, ' n ' Continue search command is still available
	# # IV, Summary
	This section learns about substitutions, undo operations, and Quick Find, where replacement and quick find within a document is useful, and you want to be able to master

Vim Replacement Lookup