regex - Perl 正则表达式/foo|bar/否定

Question

/\d/         # contains a digit
/^\D*$/      # doesn't contain a digit

/[abc]/      # contains either the letter a, b, or c
/^[^abc]*$/  # doesn't contain a, b, or c

/foo|bar/    # contains foo or bar
/???????/    # doesn't contain foo or bar

谁能帮我解决这个问题？我找不到任何解决方案，但我需要一个正则表达式来否定这个没有任何可编程逻辑。

Answer 1

您可以使用否定先行断言:

/^(?!.*(?:foo|bar)).*$/    # doesn't contain foo or bar

See it