felixblaschke

enum _AniProps { width, height, color }

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    final _tween = MultiTween<_AniProps>()
      ..add(_AniProps.width, 200.0.tweenTo(300.0), 1.seconds) // <-- chain the
      ..add(_AniProps.width, 300.0.tweenTo(100.0), 1.seconds) // <-- width property
      ..add(_AniProps.height, 100.0.tweenTo(200.0), 2.seconds)
      ..add(_AniProps.color, Colors.green.tweenTo(Colors.orange), 2.seconds);

felixblaschke

PlayAnimation<Color>( // <-- specify type of animated variable
  tween: Colors.red.tweenTo(Colors.blue), // <-- define tween of colors
  builder: (context, child, value) { // <-- builder function
    return Container(
        color: value, // <-- use animated value
        width: 100, 
        height: 100
    );
});

felixblaschke

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: Center(
          child: ControlledAnimation(

felixblaschke

class DateSelection extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    var chunkedDays = DateTime.now()
        .until(6.days.fromNow())
        .chunked(3, fill: () => null)
        .toList();

    return Column(
      children: chunkedDays.map(buildRow).toList(),

felixblaschke

// ascending order
["house", "cat", "pineapple"].sortedByNum((s) => s.length);
["house", "cat", "pineapple"].sortedByString((s) => s);

// descending order
["house", "cat", "pineapple"].sortedByNum((s) => s.length).reversed;
["house", "cat", "pineapple"].sortedByString((s) => s).reversed;

felixblaschke

class Persons extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    var persons = [
      Person(name: "Jake", age: 21),
      Person(name: "Aaron", age: 48),
      Person(name: "Berry", age: 14),
      Person(name: "Kyle", age: 32),
    ];

felixblaschke

["a", "b", "c", "d", "e"].chunked(3); // [ ["a", "b", "c"], ["d", "e"] ]

felixblaschke

var persons = [
    Person(name: "John", age: 21),
    Person(name: "Carl", age: 18),
    Person(name: "Peter", age: 56),
    Person(name: "Sarah", age: 61)
];

persons.groupBy(
    (p) => p.age < 40 ? "young" : "old",
    valueTransform: (p) => p.name

felixblaschke

var persons = [
  Person(age: 20), 
  Person(age: 30), 
  Person(age: 40)
];

persons.sumBy((p) => p.age); // 90
persons.averageBy((p) => p.age); // 30
persons.count((p) => p.age < 35); // 2
persons.minBy((a,b) => a.age.compareTo(b.age)); // Person(age: 20)

felixblaschke

import 'package:flutter/material.dart';
import 'package:simple_animations/simple_animations.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,