Please explain this pattern to me.

[Theera]

Hi Erel,
I've been understand your this,but I don't understand attached a part of picture which highlighted. Please explain more to me.

P.S. Assume IP=192.168.0.1

 

[Erel]

It is easier to analyze it if you post the string instead of the image. This part means: all characters except dot.

A better pattern would be \d+

 

[Theera]

It is easier to analyze it if you post the string instead of the image. This part means: all characters except dot.

A better pattern would be \d+

Hi Erel,
My picture come from yours ,I've understand your guide,but I don't understand the coding in the picture.

P.S. regex.IsMatch("(\d+).(\d+).(\d+).(\d+)" ,s) when s is Target string

 

[Erel]

regex.IsMatch("\d+\.\d+\.\d+\.\d+" ,s)

This code checks whether the string is made of:
\d+ -> one or more digits
\. -> a dot

So it will return true for: 1.22.12999.12

And false for 2.442

 

[Theera]

Why is it different from anothor one?

Hi Erel,
see this,I think that they are differance.

m = Regex.Matcher("^(\d+)\.(\d+)\.(\d+)\.(\d+)$", ip)

The last has both ^ and $ ,why not be m = Regex.Matcher("(\d+)\.(\d+)\.(\d+)\.(\d+)", ip) And The post #1, The character # is not special character which don't used \.

 

[Theera]

Hi all,
I've found all of data as below already,Thank you once again. see more this,This thread is closed.