Why this do not match and how to make it work?
Regex.Match("qwe", ".*?(?=([ $]))");
I should match everything to first space or to the end of line.
Why this do not match and how to make it work? Regex.Match(qwe, .*?(?=([ $])));
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Why this do not match and how to make it work?
Regex.Match("qwe", ".*?(?=([ $]))");
I should match everything to first space or to the end of line.
Your specific problem is that you need to use an alternation, not a character class, because inside a character class the $ symbol literally means “match a dollar symbol”, and does not have its special meaning end-of-line in that context.
It seems however that your example is a bit strange. It would be simpler to match any character except space, then you wouldn’t need a lookahead at all.