December 2009
Intermediate to advanced
560 pages
15h 5m
German
Content preview from Reguläre Ausdrücke KochbuchBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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5.9 Doppelte Zeilen entfernen
Problem
Sie haben eine Logdatei, die Ausgabe einer Datenbankabfrage oder eine andere Art von Datei oder String mit doppelten Zeilen. Sie müssen diese doppelten Einträge mit einem Texteditor oder einem ähnlichen Tool entfernen.
Lösung
Es gibt eine Reihe von Softwaretools (wie zum Beispiel das Befehlszeilentool uniq unter Unix und das Windows PowerShell Cmdlet Get-Unique), mit denen Sie doppelte Zeilen in einer Datei oder einem String entfernen können. Die folgenden Abschnitte enthalten drei Regex-basierte Ansätze, die besonders dann hilfreich sein können, wenn man versucht, diese Aufgabe in einem nicht skriptbaren Texteditor umzusetzen, der aber immerhin mithilfe von regulären Ausdrücken suchen und ersetzen kann.
Beim ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.