在vim中選擇每個單詞的首字母大寫

Question

在vim中，我知道我們可以使用~來大寫單個字符（如this question所述），但是有沒有辦法將每個單詞的首字母大寫使用vim進行選擇？

例如，如果我想從

hello world from stackoverflow 

改變

Hello World From Stackoverflow 

我應該怎麼辦呢vim的？

Answer 1

您可以使用以下替代：

s/\<./\u&/g 

• \<單詞的開頭匹配
• .一個字
• \u告訴Vim爲大寫以下字符的第一個字符匹配替換字符串(&)
• &意味着替換任何在LHS

Answer 2

:help case被匹配表示：

To turn one line into title caps, make every first letter of a word 
uppercase: > 
    : s/\v<(.)(\w*)/\u\1\L\2/g 

說明：

:      # Enter ex command line mode. 

space     # The space after the colon means that there is no 
         # address range i.e. line,line or % for entire 
         # file. 

s/pattern/result/g  # The overall search and replace command uses 
         # forward slashes. The g means to apply the 
         # change to every thing on the line. If there 
         # g is missing, then change just the first match 
         # is changed. 

圖案部分有這個意思。

\v      # Means to enter very magic mode. 
<      # Find the beginning of a word boundary. 
(.)     # The first() construct is a capture group. 
         # Inside the() a single ., dot, means match any 
         # character. 
(\w*)     # The second() capture group contains \w*. This 
         # means find one or more word caracters. \w* is 
         # shorthand for [a-zA-Z0-9_]. 

結果或替換部分具有這樣的意義：

\u      # Means to uppercase the following character. 
\1      # Each() capture group is assigned a number 
         # from 1 to 9. \1 or back slash one says use what 
         # I captured in the first capture group. 
\L      # Means to lowercase all the following characters. 
\2      # Use the second capture group 

結果：

ROPER STATE PARK 
Roper State Park 

一種替代到非常魔模式：

: % s/\<\(.\)\(\w*\)/\u\1\L\2/g 
    # Each capture group requires a backslash to enable their meta 
    # character meaning i.e. "\(\)" verses "()". 

Answer 3

Vim的提示Wiki有TwiddleCase mapping將視覺選擇切換爲小寫，大寫和標題大小寫。

如果您將TwiddleCase函數添加到您的.vimrc，那麼您只需在視覺上選擇所需的文本並按波浪字符~來遍歷每個案例。

Answer 4

試試這個正則表達式..

s/ \w/ \u&/g 

Answer 5

還有一個非常有用的vim-titlecase插件此。