Re^2: Splitting in while loop

Single quotes are technically a valid character in email addresses

For those of you who think this is just pedantry I can assure you that it is not.

Many years ago, when defensive programming was less widespread than now, a customer of $WORK did indeed have such an email address. It followed the pattern of jack.o'malley@bigcorp.com and caused no end of trouble for various systems which poor, hapless Jack was required to use. It even showed up one or two areas of $WORK's systems where such a potential injection was either mismanaged or misreported. These days Jack should have no trouble with systems from respsonsible coders but there are still plenty of slapdash operators out there who will struggle with this, even now.

If you persist in using home-grown regexen to parse email addresses (or HTML or XML or SQL or ...) then you should be aware that sooner or later it will come back to bite you.

🦛

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Re^3: Splitting in while loop by afoken (Chancellor) on Oct 07, 2021 at 18:58 UTC
... email address. It followed the pattern of jack.o'malley@bigcorp.com ... Hmm, let me guess: The first name was Robert. ;-) Alexander -- Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)	[reply]
Re^3: Splitting in while loop by tel2 (Pilgrim) on Oct 08, 2021 at 00:44 UTC
Points taken thanks guys, but in my case I'm just using them as a quick hack to visually show the limits of the address in the output, e.g. there is no leading/trailing spaces, etc. In the rare event that I did end up with this kind of thing being output: 'jack.o'malley@bigcorp.com' it wouldn't matter.	[reply]