This video is part of the Dart Crash Course playlist on RU-vid. See the entire playlist here: • Dart Crash Course
Welcome to Dart Crash Course. Dart is a beautiful and modern programming language that can be used both for frontend and backend applications. In this course, we will focus on Dart as a programming language without blending in any other frameworks such as Flutter.
In this video we will discuss what optional values are and how they are useful in creating modern Dart applications. We will learn about various operators that will help you work with optionals too.
Timestamps:
00:00:00 - Intro
00:02:58 - Optionality
00:05:25 - Untyped Null Values
00:07:02 - Comparing Optionals
00:10:22 - Nullable Default Values
00:15:36 - Null-Aware Operator
00:24:28 - Nullable Collections
00:34:19 - Force Unwrapping
00:39:10 - Nullable Type Promotion
00:41:32 - Combining Null-Aware Operators
00:47:00 - Extending Optional Types
00:52:00 - Unwrapping Multiple Optionals
01:00:49 - Optional FlatMap
01:07:57 - Default Values for Optionals
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14 авг 2024
