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,
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.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.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.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.
4.19 Kreditkartennummern validieren
Problem
Sie sollen für eine Firma ein Bestellformular bauen, das auch eine Bezahlung per Kreditkarte zulässt. Da die Karten-Servicegesellschaft für jeden Transaktionsversuch eine Gebühr erhebt – auch für fehlgeschlagene Versuche –, wollen Sie mit einem regulären Ausdruck die offensichtlich ungültigen Kreditkartennummern ausfiltern.
Nebenbei verbessert das auch die Bedienungsfreundlichkeit. Ein regulärer Ausdruck kann offensichtliche Tippfehler sofort erkennen, sobald der Anwender mit dem Ausfüllen der Felder auf der Webseite fertig ist. Eine Anfrage bei der Karten-Servicegesellschaft dauert dagegen leicht einmal 10 bis 30 Sekunden.
Lösung
Leerzeichen und Bindestriche entfernen
Lesen Sie die vom Kunden eingegebene ...
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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.