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I tried this but it doesn't work :
[^\s-] Any Ideas?
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Non-whitespace character: \S.
The quantifier notations In regular expressions, the hyphen ("-") notation has special meaning; it indicates a range that would match any number from 0 to 9. As a result, you must escape the "-" character with a forward slash ("\") when matching the literal hyphens in a social security number.
A regex to match a string that does not contain only whitespace characters can be written in two ways. The first involves using wildcards (.) and the non-whitespace character set (\S), while the other one involves a positive lookahead to check that the string contains at least one non-whitespace character (\S).
A whitespace character is a space (U+0020), tab (U+0009), newline (U+000A), line tabulation (U+000B), form feed (U+000C), or carriage return (U+000D). A space is U+0020. A non-space character is any character that is not a whitespace character.
[^\s-] should work and so will
[^-\s] [] : The char class^ : Inside the char class ^ is the negator when it appears in the beginning.\s : short for a white space- : a literal hyphen. A hyphen is a meta char inside a char class but not when it appears in the beginning or at the end.
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