Escape dot in a regex range

Solution 1:

The dot operator . does not need to be escaped inside of a character class [].

Solution 2:

Because the dot is inside character class (square brackets []).

Take a look at http://www.regular-expressions.info/reference.html, it says (under char class section):

Any character except ^-]\ add that character to the possible matches for the character class.

Solution 3:

If you using JavaScript to test your Regex, try \\. instead of \..

It acts on the same way because JS remove first backslash.

Solution 4:

On this web page, I see that:

"Remember that the dot is not a metacharacter inside a character class, so we do not need to escape it with a backslash."

So I guess the escaping of it is unnecessary...