如何在linux中的文件中加入具有不同模式的兩行？

Question

我想將文件中的行加入兩行。 例如，如下所示，我想加入分別有諺語​​和作者姓名的第一行和第二行。 我想加入一個文件的所有類似事件。

我可以通過使用 Shift+J 手動加入它們，但幾乎有 10000 行，而且很難做到。

118. ,119., 120., 是原始源代碼行號，它們也出現在行中。

所以我想搜索並加入所有在行首有一個數字的行，然后是一個點，然后是一個空格，然后是文本..^[0-9]*。 (118. ) 和下一行在行首沒有數字。 所以加入他們。

我到處搜索並嘗試實現它但沒有用。

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

這應該這樣做：

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

給定數據文件：

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.

這會產生輸出：

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.

該代碼確實假設只有一個續行。 如果您可以有多個續行，那么您需要一個更復雜的腳本。

$ 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\\+\\. \\)\\@! 應該在 vim 中進行。 此命令適用於多個連續行，但僅刪除換行符； 它不插入空格或任何東西。

Answer 3

在 awk 中，“文件中沒有空行且 **first line** 存在”，還需要前導空格：

$ 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

這可能對你有用（GNU sed）：

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

閱讀兩行，如果第二行不以數字開頭，則刪除換行符。

其它的辦法：

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