问题
I have this pattern .*?[a-z]([a-z])([a-z])([a-z]).*?(\s+)(\d+) from some online generator but it's not working.
I need pattern which allow:
"minimum 3 char length string, next single space, and next minimum 1 char integer" [abc 1] or the same but in different order "minimum 1 char integer, next single space, and next minimum 3 char length string" [3 gtf].
Thanks.
回答1:
Try this one:
\d+\s\w{3,}|\w{3,}\s\d+
It either matches:
- One or more digits (
\d+), followed by a single whitespace (\s), followed by three or more word characters (\w{3,}) (this is [a-zA-Z0-9], you can replace this part with [a-zA-Z] if you'd like). - Three or more word characters (this is [a-zA-Z0-9], you can replace this part with [a-zA-Z] if you'd like), followed by a single whitespace, followed by one or more digits.
Regex101
回答2:
The following expression should do what you describe:
[a-z]{3,}\s\d+|\d+\s[a-z]{3,}
Some notes:
The
{3,}construct allows you to specify repetitions within a given range. In general, it's{min,max}, but you can leave out either min or (as here) max to have an open-ended range. You can also specify an exact number of repeats by specifying a single number, e.g.{99}.The expression is essentially two complete expressions switched with alternation. Regular expressions don't allow you to say "exactly these things, in any order".
I've used
[a-z]to match the characters in the non-numeric part, as this is what you did in your original example.
来源：https://stackoverflow.com/questions/32970438/html5-input-pattern