How do I unload an event loop in Dart? It is quite a common situation for us to have APIs like Future<List<T>>.

Imagine a method that returns a list of users. What you do there is parse the json into a dart list and then somehow convert it into a typed list of models. This conversion to models can be done lazily. Just change the API to Stream<T> and you will get the idea. You can put all the elements in the event loop to process them asynchronously.

Here is the link to the working flutter app, which gives you an example of how to do this:
https://gist.github.com/hawkkiller/932140079adfdcab2cfdd4b0292bb50a

#dart #flutter #async #eventloop #tip‍‍‍

Today published a post about Dart GC. I wrote about the garbage collection process and the tricks it employs.

Today I learned an interesting algorithm for finding the majority element.

The Boyer-Moore majority algorithm is a popular algorithm for finding the majority element in a list of integers. The majority element in an array (or list) is an element that appears more than n/2 times where n is the size of the array.

Here's a simple way to describe the Boyer-Moore Voting Algorithm:

1. Start with an initial candidate and a counter set to 0.
2. Iterate over the list of numbers.
3. For the current number: If the counter is zero, set the current number as the candidate.
4. If the current number is the candidate, increment the counter. Otherwise, decrement the counter.
5. The candidate will be the majority number.

#dart #leetcode #tipoftheday #algorithm

An iterator-like interface for stream values.

Allows more elegant and flexible solutions than default "for"

https://api.flutter.dev/flutter/dart-async/StreamIterator-class.html

#tip #dart #stream

Declarative Status Bar Overlay Color in Flutter

Ever struggled with imperative SystemChrome API? See this short guide to make this process neat.

Today’s post is about DI

How to efficiently transform data using Codecs in Dart. Read in today's post :)
https://www.linkedin.com/feed/update/urn:li:activity:7130419429242224642/

Avoid these dart libraries. Briefly about their drawbacks and better alternatives.
https://lazebny.io/avoid-these-dart-libraries/

#flutter #flutterdev #dart

Modern Monorepo management in Dart and Flutter

https://lazebny.io/modern-monorepo-management

#dart #flutter #flutterdev

When updating dependencies in a Pub Workspace, use "dart pub upgrade," which automatically resolves to the correct version and updates it in every package.

#flutter #FlutterDev #dart #tip

I created a Shimmer animation in Flutter in 100 lines without libraries.

It is performant and minimizes rebuilds, based on a CustomPaint, a LinearGradient, and a Transform.

https://gist.github.com/hawkkiller/2ed40b43d6372fc322080e0c8ce76521

#dart #flutter #flutterdev

Don't use SVGs for Icons in Flutter. There are better and more performant ways.

Rendering SVG requires several time-consuming operations: reading from memory, parsing the SVG to a binary format, parsing the binary format to Dart structures, and only then rendering.

Instead, opt for icon fonts, similar to the Icons class in Flutter. A Flutter engine processes all the fonts during startup and makes them available throughout the whole app lifecycle. The performance of rendering an icon font is the same as rendering text.

#dart #flutter #flutterdev