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

var newString = string.substring((string.length - 5).clamp(0, string.length));

note: I am using clamp in order to avoid Value Range Error. By that you are also immune to negative n-characters if that is somehow calculated.

In fact I wonder that dart does not have such clamp implemented within the substring method.

If you want to be null aware, just use:

var newString = string?.substring((string.length - 5).clamp(0, string.length));