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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2.12 Teile der Regex mehrfach wiederholen
Problem
Erstellen von regulären Ausdrücken, die zu folgenden Arten von Zahlen passen:
einem Googol (eine Dezimalzahl mit 100 Stellen),
einer Hexadezimalzahl mit 32 Bit,
einer Hexadezimalzahl mit 32 Bit und einem optional Suffix
h,einer Gleitkommazahl mit einem optionalen ganzzahligen Anteil, einem verpflichtenden Nachkommateil und einem optionalen Exponenten. Jeder Teil kann eine beliebige Zahl von Stellen haben.
Lösung
Googol
\b\d{100}\bRegex-Optionen: Keine
Regex-Varianten: .NET, Java, JavaScript, PCRE, Perl, Python, Ruby
Hexadezimale Zahl
\b[a-f0-9]{1,8}\bRegex-Optionen: Groß-/Kleinschreibung wird ignoriert
Regex-Varianten: .NET, Java, JavaScript, PCRE, Perl, Python, Ruby
Hexadezimale Zahl mit optionalem Suffix ...
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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.