如何在linux中的文件中加入具有不同模式的两行？

Question

我想将文件中的行加入两行。 例如，如下所示，我想加入分别有谚语​​和作者姓名的第一行和第二行。 我想加入一个文件的所有类似事件。

我可以通过使用 Shift+J 手动加入它们，但几乎有 10000 行，而且很难做到。

118. ,119., 120., 是原始源代码行号，它们也出现在行中。

所以我想搜索并加入所有在行首有一个数字的行，然后是一个点，然后是一个空格，然后是文本..^[0-9]*。 (118. ) 和下一行在行首没有数字。 所以加入他们。

我到处搜索并尝试实现它但没有用。

118. People don't care how much you know until they know how much they care.
John C. Maxwell
119. A life lived in fear is a life half lived. - Proverb
120. Nothing great was ever achieved without enthusiasm.     
Ralph Waldo Emerson
121. Damn the torpedoes, full speed ahead. - David Farragut
122. Our lives begin to end the day we become silent about things that matter. - 
Martin Luther King, Jr.

Answer 1

这应该这样做：

awk '/^[0-9]+\./ { if (last) print last; last = $0; next }
                 { print last, $0; last = "" }'

给定数据文件：

118. People don't care how much you know until they know how much they care. 
John C. Maxwell
119. A life lived in fear is a life half lived. - Proverb
120. Nothing great was ever achieved without enthusiasm. 
Ralph Waldo Emerson
121. Damn the torpedoes, full speed ahead. - David Farragut
122. Our lives begin to end the day we become silent about things that matter. - 
Martin Luther King, Jr.

这会产生输出：

118. People don't care how much you know until they know how much they care.  John C. Maxwell
119. A life lived in fear is a life half lived. - Proverb
120. Nothing great was ever achieved without enthusiasm.  Ralph Waldo Emerson
121. Damn the torpedoes, full speed ahead. - David Farragut
122. Our lives begin to end the day we become silent about things that matter. -  Martin Luther King, Jr.

该代码确实假设只有一个续行。 如果您可以有多个续行，那么您需要一个更复杂的脚本。

$ cat new.data
118. People don't care how much you know until they know how much they care. 
John C. Maxwell
119. A life lived in fear is a life half lived. - Proverb
120. Nothing great was ever achieved without enthusiasm. 
Ralph Waldo Emerson
121. Damn the torpedoes, full speed ahead. - David Farragut
122. Our lives begin to end the day we become silent about things that matter. - 
Martin Luther King, Jr.
123. More than one line of data causes trouble for the basic script.
A more complex script can deal with those too. -
Jonathan Leffler
$ awk '/^[0-9]+\./ { if (last) print last; last = $0; next }
>                  { last = last " " $0 }
>      END         { if (last) print last }' new.data
118. People don't care how much you know until they know how much they care.  John C. Maxwell
119. A life lived in fear is a life half lived. - Proverb
120. Nothing great was ever achieved without enthusiasm.  Ralph Waldo Emerson
121. Damn the torpedoes, full speed ahead. - David Farragut
122. Our lives begin to end the day we become silent about things that matter. -  Martin Luther King, Jr.
123. More than one line of data causes trouble for the basic script. A more complex script can deal with those too. - Jonathan Leffler
$

Answer 2

:%s/\\n\\%(\\d\\+\\. \\)\\@! 应该在 vim 中进行。 此命令适用于多个连续行，但仅删除换行符； 它不插入空格或任何东西。

Answer 3

在 awk 中，“文件中没有空行且 **first line** 存在”，还需要前导空格：

$ awk '{printf "%s%s", ($1 ~ /^ *\*\*/? (NR>1?ORS:"") : OFS), $0} END {printf ORS}' file

.

{   # finish previous with ORS if current starts with a number and output it
    printf "%s%s", ($1 ~ /^ *\*\*/? (NR>1?ORS:"") : OFS), $0
} 
END {printf ORS} # closing ORS

Answer 4

这可能对你有用（GNU sed）：

sed 'N;/\n[0-9]/!s/\n//;P;D' file

阅读两行，如果第二行不以数字开头，则删除换行符。

其它的办法：

sed 'N;s/\n\([^0-9]\)/\1/;P;D' file