How am I supposed to check if a UDM field ends with $.
Note that the $ symbol can be present anywhere. but I only want to check if it is in the end.
Can somebody help.
@jstoner
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hostname = /\\$$/
/: The forward slashes at the beginning and end are delimiters. They mark the start and end of the regular expression pattern.\\$: The dollar sign ($) usually has a special meaning in regular expressions: it signifies the end of a string (or the end of a line in multiline mode). However, here it is preceded by a backslash (\\). This backslash is an escape character. It tells the regex engine to treat the following dollar sign as a literal character, not as the special end-of-string anchor.$: As mentioned before, the dollar sign without an escape character would normally match the end of a string. Here it's escaped, so it's just looking for a dollar sign.$(at the end): This is the special character$, which is not escaped, acting as the end-of-string anchor.
(explanation courtesy of Gemini)
This is the error I am getting :
tokenizing: unable to tokenize: invalid char escape
This is the error I am getting :
tokenizing: unable to tokenize: invalid char escape
It is recommended to use single quotes with re.regex
re.regex($e.target.hostname, `\\$$`)If you use double quotes you then need to escape your escape characters:
re.regex($e.target.hostname, "\\\\$$")@cmmartin_google summed it up neatly above but I will share a blog I wrote on re.regex for future reference. I took a look at trying to use double quotes for something rather than the backtick, but the last 4 paragraphs hopefully provide a nice visual why going with backticks is going to be a better way forward...
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