How to populate a dropdown with file extensions extracted from a search?

[dreamwork801]

I want my users to be able to chose a file extension from a drop down that is populated with a search. I was thinking I could do something that looks for a decimal point like this:

index = git | rex field = Data.payload.head_commit.modified{} max_match=1 "(?<extension>*"."*)" | table extension

But that doesn't work because some of the file addresses have decimal points in them so it would grab an address an not a specific file name.

Some examples:

files/payments/Request.cs
App.files/payments.js
Hello/test.payments/request.xml

And I basically would want the drop down list to populate .cs, .js, .xml and NOT .files/payments.js or NOT .payments/request.xml

[somesoni2 · Accepted solution]

Try this

index = git | rex field = Data.payload.head_commit.modified{} max_match=1 "\w+(?<extension>\.\w+)$" | table extension

[somesoni2]

For getting all the values matched in a multivalued field, use max_match=0 (for unlimited)

[dreamwork801]

I want the rex to get all extensions.
Okay will do. Thank you

[somesoni2]

If Data.payload.head_commit.modified{} is a multivalued field, do you want the rex to get all the extentions or just the first one?

By the way your approach is good as stats also eliminates duplicates. You might want to get rid of "sort extension" though, stats output will already by sorted by extension.

[dreamwork801]

That works! Thank you. The only small problem I have is that Data.payload.head_commit.modified{} may have multiple values and so when the rex grabs the extensions it groups them weird. So I have a way around by doing

index = git | rex field=Data.payload.head_commit.modified{} max_match=1 "\w+(?.\w+)$" | stats count by extension | sort extension | fields - count

Because stats pulls out the indivual values instead of leaving them grouped. I didn't know if you knew of a cleaner way to do this. Thanks