A common requirement when working with maps is to: Update the value if a given key already exists Set the value if it doesn't You may be tempted to implement some conditional logic to handle this: class ShoppingCart { final Map<String, int> items = {}; void add(String key, int quant...
How to Create a Dating App: 7 Steps Plan To help you find the most appropriate approach to successful dating app development, here is a 7-step roadmap that may come in handy: Step 1. Define your niche Before creating a dating app from scratch, it’s very important to define the exact...
main.dart import 'dart:convert'; class User { final String name; final String occupation; User(this.name, this.occupation); User.fromJson(Map<String, dynamic> m) : name = m['name'], occupation = m['occupation']; Map<String, dynamic> toJson() => { 'name': name, 'occupation': ...
find_all.dart import 'dart:io'; import 'package:xml/xml.dart'; void main() async { var file = new File('books.xml'); String data = file.readAsStringSync(); var xdoc = XmlDocument.parse(data); var books = xdoc.findAllElements('book'); books .map((e) => e.text.trim()....
map((CustomTab tab) { return MyTab( tab: tab, isSelected: myTabs.indexOf(tab) == selectedIndex); }).toList(), ), )); } } As a tab is selected, the corresponding page is displayed. The MyTab class is a custom widget that displays the tab icon and text:...
This is the second and final part of a tutorial that teaches you how to create an app like Runkeeper, complete with color-coded maps and badges!
import'package:flutter/cupertino.dart'; classOptions with ChangeNotifier{ String key; String point; bool checked; Options({this.key,this.point,this.checked}); MaptoJson()=>{ 'key':key, 'point':point, 'checked':checked }; } jsonEncode(options) after toJson() implementation ...
import'package:flutter_facebook_login/flutter_facebook_login.dart';import'package:google_sign_in/google_sign_in.dart'; Now, we’re going to have two independent parts that are going to take care of our authentication flow. The first one is going to initiate either a Facebook or Google sig...
In Fiori Elements – Develop a List Report Basic Approach we looked at the simplest way to create a List Report using an OData service based on a purpose built CDS view with all of the annotations pre-set. In this blog we look at alternate approach when you have an OData service ...
create a .env file to store your API keys in plaintext add that .. file to .gitignore install the ENVied package createan env.dart file and definethe Env class with one field for each API key, using obfuscate: true run the code generator add theenv.g.dart file to .gitignore...