[regex] vim을 사용하여 선택한 각 단어의 첫 글자를 대문자로 표시

:help case 말한다 :

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

설명:

:                      # 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.

패턴 부분에는이 의미가 있습니다.

\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_].

결과 또는 대체 부분은 다음과 같은 의미를 갖습니다.

\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

결과:

ROPER STATE PARK
Roper State Park

매직 모드의 대안 :

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