SkipWhile function for Strings

[Jas91]

how does it really work? can't fully figure out its real purpose because I couldn't find good examples/documentations on the internet

This is what I have to do:

I have a var string "str1" which contains a text
and a var string "str2" where I have to copy to, a substring of str1 from its the last char "c" till the end of the string

 

[JohnH]

Enumerable.SkipWhile(TSource) Method (IEnumerable(TSource), Func(TSource, Boolean)) (System.Linq)
It is an extension method, in this case it extends String because that is a IEnumerable(Of Char). It's purpose is the same for all collections it extend, and that is:

Bypasses elements in a sequence as long as a specified condition is true and then returns the remaining elements.

I would say that is not relevant for what you're trying to do. You can find the last index of a char using String.LastIndexOf method, and then String.Substring method to return the remaining string from that index.

 

[Jas91]

yup, that's what I did thank you for the explanation, I wrongly thought that method could have suited my needings

 

[jmcilhinney]

You could use SkipWhile for that purpose like this:

str2 = New String(str1.SkipWhile(Function(ch) ch <> "c"c).ToArray())

Most likely LastIndexOf and Substring would be faster though, although the difference may be slight.