Vim search and replace summary

Summary of common replacement modes in VIM. 0,: g/null/d find the null line and delete 1. the simple replacement expression replacement command can replace the other word with one word in the full text :: % s/four/4/g % range prefix indicates replacement in all rows. The final g mark indicates a summary of the commonly used replacement modes in... VIM in the replacement line.
 
 
 
0,: g/null/d
 
Locate the null row and delete it.
 
 
 
1. simple replacement expression
 
The replacement command can replace another word with one word in the full text:
 
: % S/four/4/g
 
The prefix of "%" indicates that replacement is performed in all rows. The last "g" Mark replaces all matching points in the row. If you only operate on the current row, remove %.
 
If you have a word like "thirtyfour", the above Command will fail. In this case, the word is replaced with "thirty4 ″. To solve this problem, use "\ <" to specify the start of the matching word:
 
: % S /\  
Obviously, errors will still occur when processing "fourty. Use "\>" to solve this problem:
 
: % S /\ /4/g
 
If you are coding, you may just want to replace the "four" in the comment, but keep the "four" in the code. Since this is difficult to specify, you can add a "c" mark in the replacement command, so that Vim will prompt you before each replacement:
 
: % S /\ /4/gc
 
 
 
 
 
2. delete unnecessary spaces.
 
To delete unnecessary spaces behind each line, run the following command:
 
: % S/\ s \ + $ //
 
The command specifies that the range is "%", so this will apply to the entire file ." The matching mode of the substitute command is
 
\ S \ + $ ". This indicates one or more (\ +) spaces (\ s) before the end of the line ($ ). The "to" part of the replacement command is empty :"//". In this way, the matching spaces are deleted.
 
 
 
 
 
3. matching repetition mode
 
The asterisk (*) specifies that the items before it can be repeated at any time. Therefore:
 
/*
 
Match "a", "aa", "aaa", and so on. But it also matches "" (null string), because zero times are also included. The asterisk "*" is only applied to the item next to it. Therefore, "AB *" matches "a", "AB", "abb", and "abbb. To repeat the entire string multiple times, the string must be an item. Add "\ (" and "\)" before the component. Therefore, this command:
 
/\ (AB \)*
 
Matching: "AB", "abab", "ababab", and so on. It also matches "".
 
To avoid matching null strings, use \ + ". This indicates that the previous item can be matched once or multiple times.
 
/AB \ +
 
Match "AB", "abb", "abbb", and so on. It does not match "a" that follows "B ".
 
To match an option, use "\ = ". For example:
 
/Folders \ =
 
Matches "folder" and "folders ".
 
 
 
 
 
4. specify the number of repetitions
 
To match a specific number of times of repetition, use the form "\ {n, m. "N" and "m" are numbers. The item before it will be repeated "n" to "m" Times (| aggressive sive | contains "n" and "m "). For example:
 
/AB \ {3, 5}
 
Match "abbb", "abbbb", and "abbbbb ".
 
When "n" is omitted, it is 0 by default. When m is omitted, it is infinitely large by default. When ", m" is omitted, it indicates that the repetition is exactly "n" times. For example:
 
Number of pattern matches
 
\ {, 4} 0, 1, 2, 3, or 4
 
\ {3,} 3, 4, 5, and so on
 
\ {0, 1} 0 or 1, same as \ =
 
\ {0,} 0 or more, the same *
 
\ {1,} 1 or more, same as \ +
 
\ {3} 3
 
 
 
 
 
5. select one or more matches.
 
In a search mode, the "or" operator is "\ | ". For example:
 
/Foo \ | bar
 
This command matches "foo" or "bar ". More options can be connected to the following:
 
/One \ | two \ | three
 
Match "one", "two", or "three ".
 
To match multiple times, the entire decision structure must be placed between "\ (" and:
 
/\ (Foo \ | bar \) \ +
 
This command matches "foo", "foobar", "foofoo", "barfoobar", and so on.
 
Another example:
 
/End \ (if \ | while \ | \)
 
This command matches "endif", "endwhile" and "endfor"