CODEWITHSUNDEEP
c#regex
Prashant Cholachagudda
Prashant Cholachagudda

Reputation: 13090

How to separate numbers and characters with RegEx?

I have following regulare expression string

(\d+)(((.|,)\d+)+)?(ms|s| ms| s)

It validates if user entered a correct string for milliseconds and seconds. Example of possible values are

for further operations I need to seperate out the string and the number, for example, if value entered is 123.45ms I should get 123.45 and ms.

As of now I'm only getting the number and string is lost!

I can split the numbers and string in two different steps, but I'm interested in doing at once, any suggetions how can I do it?

Upvotes: 1

Views: 1059

Answers (3)

Godwin
Godwin

Reputation: 9937

I think you are indeed getting the number and unit, the problem is it's getting put into a larger array element than you think. I would suggest amending your regex to:

(\d+)([\.|,]\d+)?\s?(m?s)

Now you will have your number's integer at 1, decimal if it exists at 2 (or if not it will be empty) and unit at 3. It's a little tidier and you won't get the space in your unit anymore.

Alternatively you could use:

(\d+[\.|,]\d+|\d+)\s?(m?s)

if you always want your number at index 1 and unit at 2.

Upvotes: 1

Strelok
Strelok

Reputation: 51481

You are very close. You are already specifying match groups. Have a look at Match.Groups property.

Upvotes: 2

Petar Ivanov
Petar Ivanov

Reputation: 93090

You use groups:

        string s = "123.45ms";
        Match m = Regex.Match(s, @"(\d+([.,]\d+)?) *(ms|s)");

        if (m.Success)
        {
            Console.WriteLine(m.Groups[1]);
            Console.WriteLine(m.Groups[3]);
        }

Upvotes: 4

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