How to capitalize the first letter of a string in dart?

Issue

How do I capitalize the first character of a string, while not changing the case of any of the other letters?

For example, "this is a string" should give "This is a string".

Solution

Since dart version 2.6, dart supports extensions:

extension StringExtension on String {
    String capitalize() {
      return "${this[0].toUpperCase()}${this.substring(1)}";
    }
}

So you can just call your extension like this:

import "string_extension.dart";

var someCapitalizedString = "someString".capitalize();

Answered By - Hannah Stark