How to add underscore to filename

[kizer8]

Hi,

Does anyone know how to add an underscore (_) to a randomly named filename before the 1st occurrence of a number? It could be any text characters or any numbers, I want to add an underscore in between the 1st occurrence of a number.

For example:

test12425.txt
junk4234.txt
help67463.txt

[therube]

1:RegEx

Code: Select all

Match:  ([^\d]+)(\d)(.*)
Replace:  \1_\2\3


Match 1 or more not-digits
Match a digit
Match everything else

Stick an, _, between the not-digits & the (first) digit.

[kizer8]

This is awesome thank you very much.