How to get the last n-characters in a string in Dart?

Question

How do I get the last n-characters in a string?

I\'ve tried using:

var string = \'Dart is fun\';
var newString = string.substring(-5);

Answer 1

Create an extension:

extension E on String {
  String lastChars(int n) => substring(length - n);
}

Usage:

var source = 'Hello World';
var output = source.lastChars(5); // 'World'