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This article introduces the knowledge of "how to use vim to handle character case conversion". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Usually, we often encounter the problem of case conversion when writing programs. Vim provides many very convenient case conversion commands, which can quickly convert letters, words and arbitrary lines, and can be used in combination with vim cursor movement instructions.

~ change the case of the letters under the cursor

3 ~ change the case of the three letters at the beginning of the cursor

Change the case of the letters on the current line

U changes all letters selected in visual mode to uppercase letters

U changes all letters selected in visual mode to lowercase

GUU changes the letters of the current line to uppercase

3gUU changes the letters from the cursor to the following three lines to uppercase

Guu changes all the letters on the current line to lowercase

GUw changes the words under the cursor to uppercase.

Guw changes the words under the cursor to lowercase.

The command for case conversion in vim is

Gu or gU

A more vivid explanation is that small u means lowercase; large U means uppercase.

The rest is the qualification of these two commands (lines, letters, words) of the operation, etc.

1. The whole article is converted from uppercase to lowercase.

After you open the file, you do not need to enter command line mode. Type: ggguG

Explain: ggguG is divided into three segments of ggguG

Gg= cursor to the first character of the file

Gu= lowercase the selected range

G = to the end of the file

2. Convert the whole article from lowercase to uppercase

After you open the file, you do not need to enter command line mode. Type: gggUG

Explain: gggUG is divided into three segments of gggUG

Gg= cursor to the first character of the file

GU= capitalizes the selection

G = to the end of the file

3. Convert only one word

Guw 、 gue

GUw 、 gUe

In this way, the words behind the cursor are converted to lowercase

The command to convert five words is as follows:

Gu5w 、 gu5e

GU5w 、 gU5e

4. Convert the case of several lines

Position the cursor over the line you want to convert, and type: 1gU converts lowercase to uppercase from the cursor line to the next line

10gU, 11 lines of lowercase to uppercase conversion

And so on, there are other case conversion commands

GU0: changes to uppercase from the position of the cursor to the beginning of the line

GU$: changes to uppercase from the cursor position to the end of the line

GUG: from the cursor position to the last character of the article, it becomes uppercase.

GU1G: from the cursor position to the first character of the article, it becomes uppercase.

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