Question in regex

[Subha Garg]

Hello Ranchers


Can someone explain me in regex a . (dot) is considered a metacharacter without preceding \\ but.(d->digit,s->space,w->word character) are considered metacharacter by putting preceding \\ i.e \\d \\w \\s

Why is it so?

[Rohit Garg]

Hi all,
If you simply right "d" "w" or "s" it would mean that you are trying to find these srtings in the given pattern.
But, when you put a "." in the matcher, then it means that you are trying to fit in any character.
If you want to find the "." character, then you will have to preceed it with / or //

If you want to find digits words or whitespace then you will have to preceed the "d" "w" or "s" with a / or //

Point out if I am wrong on this.
Regards.