Regex to split string into comma-separated tags

[J_W1]

My datafile has a field with multiple tags that are joined like this:

TagoneTagtwoTagthree

Is there a formula possible, with help of regex, to put a comma between all lowercaseUppercase instances to seperate them?

[Kamille_Parks · Accepted solution]

Yep.

REGEX_REPLACE(Tags, "([a-z])([A-Z])", "$1,$2" )

[Rupert_Hoffsch1]

@Kamille_Parks If you don’t mind, what you point me to a support article in which the use of variables ($1/$2 in your case for the capture groups) is described? I tried to find it just now and couldn’t… Thank you!

[Kamille_Parks]

its not really documented, just noted that putting parentheses around a portion of a query creates a “numbered capturing group”. from there its extrapolating the relative order of each group you create preceded by a $

GitHub

Syntax · google/re2 Wiki

RE2 is a fast, safe, thread-friendly alternative to backtracking regular expression engines like those used in PCRE, Perl, and Python. It is a C++ library. - Syntax · google/re2 Wiki

[Rupert_Hoffsch1]

Thank you! (just adding characters to reach 20 characters… ;))