How do get a random element from a List in Dart?

Question

How can I retrieve a random element from a collection in Dart?

var list = [\'a\',\'b\',\'c\',\'d\',\'e\'];

Answer 1

You can use the dart_random_choice package to help you.

import 'package:dart_random_choice/dart_random_choice.dart';

var list = ['a','b','c','d','e'];
var el = randomChoice(list);

Answer 2

import "dart:math";

var list = ['a','b','c','d','e'];

// generates a new Random object
final _random = new Random();

// generate a random index based on the list length
// and use it to retrieve the element
var element = list[_random.nextInt(list.length)];

Answer 3

This works too:

var list = ['a','b','c','d','e'];

//this actually changes the order of all of the elements in the list 
//randomly, then returns the first element of the new list
var randomItem = (list..shuffle()).first;

or if you don't want to mess the list, create a copy:

var randomItem = (list.toList()..shuffle()).first;

Answer 4

import "dart:math";

var list = ['a','b','c','d','e'];

list[Random().nextInt(list.length)]