iAmWillShepherd

import 'package:lib1/lib1.dart';
import 'package:lib2/lib2.dart' as lib2;

// Uses Element from lib1.
Element element1 = Element();

// Uses Element from lib2.
lib2.Element element2 = lib2.Element();

iAmWillShepherd

// Import only foo.
import 'package:lib1/lib1.dart' show foo;

// Import all names EXCEPT foo.
import 'package:lib2/lib2.dart' hide foo;

Source code from: https://dart.dev/guides/language/language-tour#libraries-and-visibility

iAmWillShepherd

You can throw any valid object in Dart and still get a stack trace. Note that the stacktrace is independent from the error/exception.

Throwing a string

void main(List<String> arguments) {
  try {
    throw "I'm throwing a string, not an error!";
  } catch (e, stack) {
    print(

iAmWillShepherd

Use the const keyword when you want to create a compile-time constant.
Note that this value will be immutable.

const color = 'Lava Orange';
color = 'Mexico Blue';  // Error: cannot reassign a const

const colors = ['Lava Orange'];
colors.add('Lava Orange');  // Error: unsupported operation

iAmWillShepherd

Dart

const colors = ['840420', '2898b2', '606476'];
const hexCodes = ['#000000', for (var c in colors) '#$c', '#ffffff'];

hexCodes;  // ['#000000', '#840420', '#2898b2', '#606476', `#ffffff`]

vs

iAmWillShepherd

const xs = [1, 2, 3];
const xsWithZero = [0, ...xs];
print(xsWithZero);  // [0, 1, 2, 3]

const xsWithZeroBack = [...xs, 0]
print(xsWithZeroBack)' // [1, 2, 3, 0]

iAmWillShepherd

Issue updating data tags via API

I tried updating the tags for a device and received a success result from the API; however, upon instpecting the device in the dashboard, I noted the device was not updated.

☝️ This is after executing the request several times.

Request

iAmWillShepherd

Future<void> somethingThatCanFail() async {
  try {
    // try some stuff likely to fail
  } on SocketException catch (_) {
    print('Something happend to the internet')
  } on IOException catch (_) {
    print('Something happened to your disk');
  } catch (e) {
 print('An unexpected error occured: $e');

iAmWillShepherd

const zeroTo60 = <String, double>{
  'Porsche 991.2 Carerra T': 3.5,
  'Porsche 991.2 Carerra GTS': 3.4,
  'Porsche 991.2 GT3': 3.0,
  'Porsche 991.2 GT3': 3.6,
  'Porsche 992 Turbo S': 2.2,
  'Porsche 992 GT3': 2.7
}

const s = Set.from(zeroTo60.keys)

iAmWillShepherd

class Color {
  static const red = '#f00';
  static const green = '#0f0';
  static const blue = '#00f';
  static const black = '#000';
  static const white = '#fff';
}