psayre23

Below are the Big O performance of common functions of different Java Collections.


List                 | Add  | Remove | Get  | Contains | Next | Data Structure
---------------------|------|--------|------|----------|------|---------------
ArrayList            | O(1) |  O(n)  | O(1) |   O(n)   | O(1) | Array
LinkedList           | O(1) |  O(1)  | O(n) |   O(n)   | O(1) | Linked List
CopyOnWriteArrayList | O(n) |  O(n)  | O(1) |   O(n)   | O(1) | Array

lopspower

Hexadecimal color code for transparency

How to set transparency with hex value ?

For example, you want to set 40% alpha transparence to #000000 (black color), you need to add 66 like this #66000000.

Download This sample on Google Play Store

nikhilmufc7

// Error Codes for SignUp

ERROR_OPERATION_NOT_ALLOWED` - Indicates that Anonymous accounts are not enabled.
ERROR_WEAK_PASSWORD - If the password is not strong enough.
ERROR_INVALID_EMAIL` - If the email address is malformed.  
ERROR_EMAIL_ALREADY_IN_USE - If the email is already in use by a different account. 
ERROR_INVALID_CREDENTIAL` - If the [email] address is malformed.
  
  // sending password reset email
ERROR_INVALID_EMAIL` - If the [email] address is malformed.

vincevargadev

rm -f ios/Podfile ios/Podfile.lock pubspec.lock && rm -rf ios/Runner.xcworkspace/xcshareddata/ && 
flutter clean &&
flutter pub cache repair &&
rm -f ios/Podfile ios/Podfile.lock pubspec.lock  && 
flutter pub get &&
flutter pub run build_runner clean

LordGhostX

{
    "9 payment service Bank": "120001",
    "AB MICROFINANCE BANK": "090270",
    "ABBEY MORTGAGE BANK": "070010",
    "ABOVE ONLY MICROFINANCE BANK": "090260",
    "ABU MICROFINANCE BANK": "090197",
    "ACCESS BANK": "000014",
    "ACCESSMONEY": "100013",
    "ACCION MFB": "090134",
    "ADDOSSER MFBB": "090160",

jogboms

import 'package:flutter/rendering.dart';
import 'package:flutter/widgets.dart';

class Space extends LeafRenderObjectWidget {
  const Space(this.space, {Key? key}) : super(key: key);

  final double space;

  @override
  RenderObject createRenderObject(BuildContext context) => RenderSpace(space: space);

jogboms

Demystifying the journey from Widget to the RenderObject.

These are Dartpad links to the examples. Full repo can be found jogboms/flutter_guild_demo

Widget ・ Gist ・ Dartpad

Multi-Child layout ・ Gist ・ Dartpad

CustomPainter ・ Gist ・ Dartpad

ConnerWill

ANSI Escape Sequences

Standard escape codes are prefixed with Escape:

• Ctrl-Key: ^[
• Octal: \033
• Unicode: \u001b
• Hexadecimal: \x1B
• Decimal: 27

medwonuola

import 'dart:math';

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

craiglabenz

import 'dart:math';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override