Sort String list with Numeric Values

Question

I have a list of string, which is most likely, but not guaranteed to contain a list of numerics, i.e.,

{\"1\", \"6\", \"2\", \"21\", \"89\"}

Answer 1

If this is C#, that's what Int32.TryParse() is for.

If this is C++, then std::string::find_first_not_of is a decent bet. Pass it a string containing the ascii chars for the digits 0 to 9 (plus the minus and plus signs?) and if it returns -1 then it is an integer.