Regular Expression: Match Any Word Until First Space

This should do it:

^\S*

Perhaps you could try ([^ ]+) .*, which should give you everything to the first blank in your first group.

Derived from the answer of @SilentGhost I would use:

^([\S]+)

Check out this interactive regexr.com page to see the result and explanation for the suggested solution.

for the entire line

^(\w+)\s+(\w+)\s+(\d+(?:\/\d+){2})\s+(\w+)$

I think, that will be good solution: /\S\w*/

I think, a word was created with more than one letters. My suggestion is:

[^\s\s$]{2,}

^([^\s]+) use this it correctly matches only the first word you can test this using this link