Regex get text before and after a hyphen

This is quite simple:

.*(?= - )     # matches everything before " - "
(?<= - ).*    # matches everything after " - "

See this tutorial on lookaround assertions.

If you cannot use look-behinds, but your string is always in the same format and cannout contain more than the single hyphen, you could use

^[^-]*[^ -] for the first one and \w[^-]*$ for the second one (or [^ -][^-]*$ if the first non-space after the hyphen is not necessarily a word-character.

A little bit of explanation: ^[^-]*[^ -] matches the start of the string (anchor ^), followed by any amount of characters, that are not a hyphen and finally a character thats not hyphen or space (just to exclude the last space from the match).

[^ -][^-]*$ takes the same approach, but the other way around, first matching a character thats neither space nor hyphen, followed by any amount of characters, that are no hyphen and finally the end of the string (anchor $). \w[^-]*$ is basically the same, it uses a stricter \w instead of the [^ -]. This is again used to exclude the whitespace after the hyphen from the match.