In case it is JS it indicates the start and end of the regex, like quotes for strings. stackoverflow.com/questions/15661969/…

Oct 1, 2012 · In Regex, . refers to any character, be it a number, an aplhabet character, or any other special character. * means zero or more times.

Dec 23, 2013 · The question is very unclear, but I think it was really asking how to ignore commas in double quotes (that is, how to parse a line of a csv file) and the example given was just one …

While writing this answer, I had to match exclusively on linebreaks instead of using the s-flag (dotall - dot matches linebreaks). The sites usually used to test regular expressions behave …

I am trying to use a regular expression validation to check for only decimal values or numeric values. But user enters numeric value, it don't be first digit "0" How do I do that?

The caret inside of a character class [^ ] is the negation operator common to most regular expression implementations (Perl, .NET, Ruby, Javascript, etc). So I'd do it like this: [^\W\s\d] ^ …

I was pretty much assuming this was a throwaway script - both the regex approach and the string search approach have all sorts of inputs they'll fail on. For anything in production, I would want …

I now try to match the string given by the user with the following, automatically created, regex expression: ^(part1|part2)$ This only returns answer 1 and 2 as correct while answer 3 would …

Sep 4, 2009 · How do you write a regular expression that matches a numeric range from 0 or 000 to 180 ?

Jan 2, 1999 · Parentheses in regular expressions define groups, which is why you need to escape the parentheses to match the literal characters. So to modify the groups just remove all of the …