regex_matches unintuitive

Connor McCormick

What am I supposed to put in Subject? Where do I put the regex?
[image.png]

Michael Udinski

Check out our docs for an example the subject is the text subject you are searching through with your regular expression

https://docs.xano.com/working-with-data/data-type-filters/text-filter#regex_matches

Connor McCormick

You should know that searching regex in the documentation returns nothing:
[image.png]

Connor McCormick

This regex does not seem to work:
.*\..{3,4}$
Even though it works in testers:
[image.png][image.png][image.png]

What regex flavor do you use?

See this function: https://x0n1-tbv3-v8eo.n7.xano.io/admin/workspace/1/function/31

Connor McCormick

Wait...Why isn't this working?
text input was:
pedagogy.pdf
[image.png][image.png]
https://x0n1-tbv3-v8eo.n7.xano.io/admin/workspace/1/function/31

Connor McCormick

Matching everything isn't even working:
[image.png]

Michael Udinski

 Regex requires delimiters to set boundaries of your regular expression. Typically, these are /

So in your most recent example, you would write

/.*/

You can read more on how to use regex in the documentation link from above where delimiters and examples of special characters are shown

Connor McCormick

This is the sort of thing that might be useful to include in the filter itself. 

Also, would you be willing to check out whether it's possible to make the search term "regex" show up when searching the documentation?

Victor Morgan

I'm also having a problem with regex expressions; are all standard inputs coded into Xano?

I am attempting to remove all strings from a list that are less than 3 characters long by using regex to find the lines, replacing them with a blank and then removing the blanks.

The regex commands with + seem to work as intended, but I can't get the regex commands using {from, to} to work at all.

This command /\w{1,3}/  should find all the strings that are between 1 and 3 characters long. Instead is finding anything with a A-Z,a-z,0-9 of a length greater than 1 inserting a blank.

Each of these return the same result in my text list.
 /\w{1,2}/
 /\w{1,3}/
 /\w{1,4}/
 /\w{1,5}/

The resulting list only contains special characters. 
 

[image.png]

Victor Morgan

The problem was behind the keyboard; this worked exactly as designed, just not as I intended. 

For my purposes, I needed to add this: /\A.{1,3}\Z/

It removes any character between 1 and 3 characters long between the beginning (A) and end (Z) of the list item.

This resource was particularly helpful.

https://www.rexegg.com/regex-quickstart.html

Michael Udinski

 - we've contacted GitLab support on the issue, thanks for letting us know!