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Table of Contents

LazyStream in Flutter and Dart

Source Code

Cancelable APIs in Flutter

Source Code

Asset Data in Flutter

Source Code

API Caching in Flutter

Source Code

FutureGroup in Dart

Source Code

Flatten Iterable<bool> in Dart

Source Code

Caching Temp Files in Flutter

Source Code

Custom Lists in Dart

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Optional Chaining in Dart

Source Code

MapList in Flutter

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Future<bool> in Flutter

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Async Bloc Init in Flutter

Source Code

Firebase Auth Errors in Flutter

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Debug Strings in Flutter

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Keyboard Appearance in Flutter

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Get String Data in Dart

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Stream.startWith in Flutter

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Optional Functions in Dart

Source Code

AnnotatedRegion in Flutter

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Unordered Map Equality in Dart

Source Code

Iterable to ListView in Flutter

Source Code

Password Mask in Flutter

Video Demo

Source Code

Fast Object.toString() in Dart

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Copying Bloc State in Flutter

Source Code

Iterable Subscripts in Dart

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useState in Flutter Hooks

Video Demo

Source Code

Folding Iterables in Dart

Source Code

Custom Iterables in Dart

Source Code

Class Clusters in Dart

Source Code

Iterable +/- in Dart

Source Code

Periodic Streams in Dart

Source Code

EmptyOnError in Dart

Source Code

Stream<T> Initial Value in Flutter

Video Demo

Source Code

Double.normalize in Dart

Source Code

Hide Sensitive Information in Flutter

Video Demo

Source Code

Iterable.compactMap in Dart

Source Code

useEffect in Flutter Hooks

Source Code

Merging Streams in Dart

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Isolate Stream in Dart

Source Code

Network Image Retry in Flutter

Source Code

Reusable APIs in Flutter

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ListTile Shadow in Flutter

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Transparent AppBar in Flutter

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Constructors on Abstract Classes in Dart

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@useResult in Dart

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@mustCallSuper in Dart

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Object.hash in Dart

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Expanded Equally in Flutter

Source Code

Random Iterable Value in Dart

Video Demo

Source Code

Hardcoded Strings in Flutter

Source Code

Manually Scroll in List View in Flutter

Video Demo

Source Code

AsyncSnapshot to Widget in Flutter

Source Code

Breadcrumbs in Flutter

Video Demo

Source Code

Unique Map Values in Dart

Source Code

Smart Quotes/Dashes in Flutter

Source Code

Haptic Feedback in Flutter

Video Demo

Source Code

Localization Delegates in Flutter

Source Code

Extending Functions in Dart

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Paginated ListView in Flutter

Video Demo

Source Code

Immutable Classes in Dart

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Card Widget in Flutter

Source Code

List Equality Ignoring Ordering in Dart

Source Code

Shorten GitHub URLs in Dart

Source Code

Time Picker in Flutter

Video Demo

Source Code

Throttled Print in Flutter

Source Code

Map Equality in Dart

Source Code

Unique Maps in Dart

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Raw Auto Complete in Flutter

Video Demo

Source Code

Title on Object in Dart

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Compute in Flutter

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Filter on Map in Dart

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Type Alias in Dart

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ValueNotifier in Flutter

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Object to Integer in Dart

Source Code

Image Opacity in Flutter

Video Demo

Source Code

Covariant in Dart

Source Code

Custom Errors in Streams in Dart

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Shake Animation in Flutter

Video Demo

Source Code

Throw Enums in Dart

Source Code

Future Error Test in Flutter

Source Code

Generic URL Retrieval in Dart

Source Code

Custom Error Widget in Flutter

Source Code

Handle Multiple Future Errors in Dart

Source Code

Future Error Handling in Dart

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String to Toast in Flutter

Video Demo

Source Code

Waiting in Dart

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Loading Dialog in Flutter

Video Demo

Source Code

Compact Map on Map<K,V> in Dart

Source Code

Query Parameters in Dart

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Multiple Gradients in Container in Flutter

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Filter on Stream<List<T>> in Dart

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Generic Route Arguments in Flutter

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Generic Dialog in Flutter

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GitHub API in Flutter

Video Demo

Source Code

ChangeNotifier in Flutter

Video Demo

Source Code

Refresh Indicator in Flutter

Video Demo

Source Code

FlatMap in Dart

Source Code

OrientationBuilder in Flutter

Video Demo

Source Code

Linear Gradient in Flutter

Source Code

Bloc Text Editing Controller in Flutter

Video Demo

Soure Code

Blurred TabBar in Flutter

Video Demo

Source Code

Play YouTube in Flutter

Video Demo

Source Code

ListView Background in Flutter

Video Demo

Source Code

Integer to Binary in Dart

Source Code

Split String by Length in Dart

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Image Tint in Flutter

Video Demo

Source Code

SlideTransition in Flutter

Video Demo

Source Code

Expansion Panels and Lists in Flutter

Video Demo

Source Code

Complete CRUD App in Flutter

Video Demo

Source Code

SQLite Storage in Flutter

Video Demo

Source Code

Circular Progress with Percentage in Flutter

Video Demo

Source Code

Opening URLs in Flutter

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Commodore 64 Screen in Flutter

Video Demo

Source Code

Animated Lists in Flutter

Video Demo

Source Code

CheckboxListTile in Flutter

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- Operator on String in Dart

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Dart Progress for Future<T>

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Move Widget Shadows with Animation

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Gallery with Blurred Backgrounds in Flutter

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Custom Path Clippers in Flutter

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Frost Effect on Images in Flutter

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Custom Clippers in Flutter

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Check if Website is Up or Down in Dart

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Section Titles on ListView in Flutter

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Circular Progress in Flutter

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Displaying Scroll Wheels in Flutter

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Post Messages to Slack with Dart

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Unwrap List<T?>? in Dart

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Avoiding UI Jitters When Switching Widgets in Flutter

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Detect Redirects in Dart

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Proportional Constraints in Flutter

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Displaying Cupertino Action Sheets in Flutter

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Rotating List<T> in Dart

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Displaying SnackBars in Flutter

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Custom Tab Bar Using ToggleButtons in Flutter

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Hashable Mixins in Dart

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Flutter Tips and Tricks in Terminal

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Searching List<List<T>> in Dart

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Cloning Objects in Dart

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Color Filters in Flutter

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Flattening Lists in Dart

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Managing Duplicates in List<T> in Dart

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FlatMap and CompactMap in Dart

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Equality of List<T> in Dart

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Constants in Dart

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Displaying Scrollable Bottom Sheets in Flutter

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YouTube Ad Remover in Dart

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Fade Between Widgets in Flutter

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Sort Descriptors in Dart

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User Sortable Columns and Tables in Flutter

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Content-Length of List<Uri> in Dart

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Recursive Dot Notation on Maps in Dart

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Allow User Selection of Text in Flutter

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Placing Constraints on Widgets in Flutter

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Animating Position Changes in Flutter

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Transitioning Between Widgets in Flutter

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Doubly Linked Lists in Dart

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Reordering Items Inside List Views in Flutter

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Custom Stream Transformers in Dart

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Expanding Stream Elements in Dart

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Consume Streams for a Duration in Dart

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Shortening URLs in Dart

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LimitedBox Widget as ListView Items in Flutter

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Generically Convert Anything to Int in Dart

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Validating URL Certificates in Dart

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Displaying Popup Menus in Flutter

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Implementing Drag and Drop in Flutter

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Dismissing List Items in Flutter

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Animating Widgets with Ease in Flutter

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Displaying Tool Tips in Flutter

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Displaying Assorted Widgets Inside TableView in Flutter

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Page Indicator with Page View in Flutter

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Animating and Moving a Floating Action Button in Flutter

Source Code

Fading Network Image Widget in Flutter

Source Code

Transparent Alert Dialogs in Flutter

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Network Image Size in Dart

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Animated Icons in Flutter

Source Code

Custom Scroll Views in Flutter

Source Code

Parallax App Bar in Flutter

JSON HTTP Requests in Dart

URL Timeouts in Dart

Detecting URL File Types in Dart

Paginated Lists in Dart

Requesting DELETE on APIs in Dart

Animated Containers in Flutter

Hiding Widgets in Flutter

Simple Opacity Animation in Flutter

Vignette Widget in Flutter

Drop Down Button Configuration and Usage in Flutter

Expandable List Items in Flutter

Infinite Scrolling in Flutter

Infinite Arrays in Dart

Custom Color Picker Component in Flutter

Displaying and Reacting to Switches in Flutter

Displaying Bottom Bars in Flutter

Displaying Buttons on AppBar in Flutter

Displaying Bottom Sheets in Flutter

Converting Enums to Radio Buttons in Flutter

Check Existence of Websites in Flutter

Images inside AlertDialog in Flutter

Returning Values from AlertDialog in Flutter

Simple Grid View in Flutter

Rendering Bullet Points in Flutter

Retrying Futures in Flutter

Containers as ClipOvals in Flutter

Rich Texts in Flutter

Wrapping Widgets in Flutter

Sweep Gradients in Flutter

Stream and StreamBuilder in Flutter

Blur Effect in Flutter

Convert Enums to Strings in Dart

Replacing Text in TextField in Flutter

Aspect Ratio in Flutter

Zoom and Pan in Flutter

Resizing Images in Flutter to Fit Screen Height

Validating URLs in Flutter

FrameBuilder for Network Images in Flutter

Adding Shadow to Icons in Flutter

Calculating Median of Lists in Dart

Generic Functions with Reduce in Dart

Passing Back Data From a Screen to the Previous One in Flutter

Flinging an Animation in Flutter

Fade Animations in Flutter

Throttling User Input in Flutter

Censoring TextFields in Flutter

Customizing TextButton in Flutter

Multiline TextFields in Flutter

Filtering TextField Input in Flutter

Focusing Manually on TextFields in Flutter

Data Streams Over HTTP/HTTPs in Dart

Catching Nonexistent Accessors or Methods in Dart

Using Expando in Dart

Implementing Custom Maps in Dart

Dynamically Calling Functions in Dart

Factory Constructors in Dart

Calculating the Sum of List Items in Dart

Removing Duplicate Strings in Lists in Dart (Case-Insensitive)

Implementing Range in Dart

Converting Lists to Maps in Dart

Implementing Hashable in Dart

Random Name Generator in Dart

Capturing Stack Traces in Dart Exceptions

Removing Duplicates from Lists in Dart

Optional Spread Operator in Dart

Calling Optional Functions in Dart

Odd-Even Sort in Dart

Implementing Zip and Tuples in Dart

Swapping Values in Lists with XOR in Dart

Waiting for Multiple Futures in Dart

Using Queues as Stacks in Dart

Custom Iterators in Dart

Iterables as Ranges and Transform in Dart

Errors vs Exceptions in Dart

Custom Annotations in Dart

Classes as Enums in Dart

Spread Operator in Collection Literals in Dart

StreamBuilder and StreamController in Dart

Almost Equal in Dart

Enum Associated Values in Dart

Implementing Comparable in Dart

Implementing Custom Integer Types in Dart

Custom Subscripts in Dart

Dart List Enumeration with Index

Applying Mixins to Other Mixins in Dart

Parameter Types in Dart

Custom Exceptions in Dart

rethrowing Exceptions in Dart

mixins and JSON Parsing in Dart

mixins vs abstract classes in Dart

Drawing Shapes in Flutter with LayoutBuilder, CustomPaint and CustomPainter

Generic Type Aliases in Dart

Callable Classes in Dart

Synchronous Generators in Dart

Implicit Interfaces in Dart

Did you know that in #Dart, every #class implicitly exports an #interface that can be #implemented (as opposed to #extended) by other classes? This is called "implicit interface".

Do you know how "const" constructors work in #Dart?

Did you know that in #Dart, it is actually preferred to use #async and #await over using raw #Futures?

In #Dart, you can use a combination of #Initializer #List plus default values for your class #member #fields to create elegant and handy convenience initializers

Did you know that in #Dart, you can extract elements of a certain type from your Lists using the #whereType #generic #function instead of calculating the #equality yourselves?

Do you know about #Type #Promotion in Dart?

"address" is an optional field of the "Person" class. If you look at the "doThis()" function you see that I'm saving the value of address in a local variable and then comparing it with null and then returning if it's null. The Dart compiler is intelligent enough to understand that after the if-statement, "address" is NOT null anymore since you've already compared it with null and returned from the function.

If you look at the "insteadOfThis" function, the first one, the Dart compiler cannot make the same assumption if you don't first store the value of address in a local variable. In that first function the Dart compiler, even after the if-statement, needs you to refer to address as an optional, using "address?" syntax.

The mechanism the Dart compiler uses in the "doThis()" function is called Type Promotion.

4 lines of #Dart code that include the #spread operator, #cascade #operator, #generics, #extensions, #private prefix and #getters

Functions as First Class Citizens in Dart