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I have a regular expression with a pound # modifier.
What does \# mean in a regular expression? What does the # mean in a regular expression? Is it possible that Java is just ignoring these invalid modifiers?
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In simpler words, pounds tell us how heavy an object is. For example, the weight of a soccer ball is about one pound. A pound is expressed as lb or lbs, where “lb” stands for libra. It is a Latin word that means “balance” or “scale”.
LBS is a textspeak acronym standing for laughing but serious.
\# is not a valid regex modifier. It would technically be a way to escape a # character, IF the # meant anything significant in Java's regex. Because it doesn't, Java is just ignoring this invalidity and reading it as a # instead of throwing you an error.
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I just had this same issue. It turned out that the prior programmer "missed" when changing all the "old code" from # to | and it was a simple mistake. I found this by checking all other code in the app and found NO other # symbols, but many similar areas of code with | included. And the | was right next to the # in this code. So someone was swapping out old regex for new regex and "missed".
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