c# regex to javascript

Question

I have a line of code on the server that I want to move to the client page in javascript.

string ThePhone = "1234567890";
string ThisFormat = Regex.Replace(ThePhone, @"(\d{3})(\d{3})(\d{4})", "$1-$2-$3");

It's supposed to return 123-456-7890. How can I change this to javascript?

Thanks.

@Marcus: tried several trial-and-error changes. Can you help? — frenchie
– frenchie, Commented Jan 5, 2012 at 21:04
Kobi's answer should work. Here's an example were the given example works: jsfiddle.net/BBTfN — Marcus
– Marcus, Commented Jan 5, 2012 at 21:10

Kobi · Accepted Answer · 2012-01-05 20:51:04Z

2

It is almost exactly the same in this case:

phone = phone.replace(/(\d{3})(\d{3})(\d{4})/, '$1-$2-$3');

Notes:

You need the /g flag (/.../g) if the string may contain more than one phone (but then we may also want \b)
\d in .Net matches all Unicode digits, in JavaScript it only matches [0-9].

answered Jan 5, 2012 at 20:51

Kobi

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4 Comments

Kobi Over a year ago

In addition, there are other ways to achieve that - you can insert dashes at the right positions, or you replace /(\d{3})(\d{3})/ with '$1-$2-'.

frenchie Over a year ago

It doesn't seem to work; I know it's close but I've struggling with this conversion too. It only contains one phone; it's a string of 10 digits. When I alert the result, I get the same initial string.

Kobi Over a year ago

@frenchie - Works for me: jsbin.com/esoyat . Did you forget the phone = part by any chance?

frenchie Over a year ago

Ok, I got it: a bit earlier in the code, I was looping through the phone number and doing a parseInt on each character to see if it was an int. When it got to the 0, it dropped that character so I was actually passing 123456789 instead of the 10 digits. Thanks for your help.

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