Swift Regex not detecting

Question

I have this regex pattern:

let pattern = "\\b(#hashtag)\\b"

It should work for all keywords named: #hashtag, but is doesn’t do that. I have no idea how regexes work so can anyone help me? I am only trying to capture the exact phrase: "#hashtag".

Answer 1

You can use this regex to get the exact match for your string,

let pattern = "#hashtag\\b"

Here is a sample code you can refer to,

let pattern = "#hashtag\\b"

validateRegex(inputString: "#hashtag")

func validateRegex(inputString: String) -> Bool {
    
    guard let regularExpression = try? NSRegularExpression(pattern: pattern) else { return false }
    
    let inputValuerange = NSRange(location: 0, length: inputString.count)
    
    return regularExpression.firstMatch(in: inputString, range: inputValuerange) != nil
}

I have tested it in a playground and it is working fine.