合併2正則表達式模式

Question

我有一個包含這樣的事情（這僅適用於節選）的文本文件：

Third Doctor 
Season 7 
051 Spearhead from Space 4 3—24 January 1970 
052 Doctor Who and the Silurians 7 31 January—14 March 1970 
053 The Ambassadors of Death 7 21 March—2 May 1970 
054 Inferno 7 9 May—20 June 1970 

Season 8 
055 Terror of the Autons 4 2—23 January 1971 
056 The Mind of Evil 6 30 January—6 March 1971 
057 The Claws of Axos 4 13 March—3 April 1971 
058 Colony in Space 6 10 April—15 May 1971 
059 The Dæmons 5 22 May—19 June 1971 

注意，基本路線模式是^###\t.*\t?\t.*$（即幾乎每行有3個標籤\t） 。

我想選段標題後刪除一切，所以它看起來像這樣：

Third Doctor 
Season 7 
051 Spearhead from Space 
052 Doctor Who and the Silurians 
053 The Ambassadors of Death 
054 Inferno 

Season 8 
055 Terror of the Autons 
056 The Mind of Evil 
057 The Claws of Axos 
058 Colony in Space 
059 The Dæmons 

目前我測試中的gedit以下模式：

([^\t]*)$ # replaces not only everything after the last `\t', 
      # incl that `\t', but also lines that *does not* contain any `\t' 

然後我試圖以'選擇'的行，這應該是(?=(?=^(?:(?!Season).)*$)(?=^(?:(?!Series).)*$)(?=^(?:(?!Doctor$).)*$)(?=^(?:(?!Title).)*$)(?=^(?:(?!Specials$).)*$)(?=^(?:(?!Mini).)*$)(?=^(?:(?!^\t).)*$)(?=^(?:(?!Anim).)*$)).*$ - 正常工作，但我不知道如何將它與([^\t]*)$相結合。

Answer 1

^(\d{3}\s+.*?)(?=\s*\d).*$ 

嘗試this.Replace通過$1。用標誌m或MULTILINE取決於你regex.See演示的味道。

http://regex101.com/r/jI8lV7/8

Answer 2

既然是場由製表符分隔，您只需要使用cut獲得兩個第一場：

cut -f1,2 drwho.txt 

的知識，使用awk一樣：

awk -F"\t" '$3{print $1"\t"$2}!$3{print $0}' drwho.txt 

解釋：awk一行一行地工作，F參數定義了字段分隔符。

$3 {     # if field3 exists 
    print $1"\t"$2  # display field1, a tab, field2 
} 
!$3 {     # if field3 doesn't exist 
    print $0   # display the whole record (the line) 
}