First split then join a subset of a string
c#, join, split, string
Solution
Since the `_` after the thumb is always the first instance then `Substring` should be perfectly viable in conjunction with `IndexOf`.
string newString = myString.Substring(myString.IndexOf("_") + 1);
This should take the substring starting at the character immediately following the first instance of the `_` character.
If you wish to get the second index of `_`, here's what I recommend:
int first = myString.IndexOf("_");
int second = mystring.Substring(first).IndexOf("_");
See this answer by Jon Skeet to the question "Index of the nth occurrence of a string?" for support for this approach.
Problem
I have an input string as follows: ``` thumb_634735515600845357tchayat_november_200612.jpg ``` What I want to do is first split this string by `_`. And then take the resulting tokens at positions 1 to n and join them. Specifically, with respect to my sample input, here is my desired output. As you can see, `thumb_` has been removed from the front of the string: ``` 634735515600845357tchayat_november_200612.jpg ``` I know how to do the split. But then how do I do the join step that follows? I do realize that I can use a `for` loop to do the join. But is there a better way? I can't use a sub-string approach to do the join step because I have data before `thumb_`. Finally, note that the `_` character that follows `thumb` is always the first instance of `_`.