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I need a regular expression to match up to a couple criteria.
the string needs to be 8 characters long, and can only have the following letters in it: urdl.
I think it’d be something similar to /(.{8}('u')('r')('d')('l'))/
Can you help me out?
In C# you can use “^[urdl]{8}$”, which ensures that the length is exactly 8 characters (and no more and no less). The “^” means the beginning, “$” represents the end, and there are 8 characters – “{8}” which each match one of the letters in the set “[urdl]”.