list dart code example

Example 1: declaring and initializing a list in dart

import 'dart:core';

void main() {

  //List of integers
  List<int> intArr = [1,2,3,4,5];
  print(intArr);
  
  //List of strings
  List<String> strArr = ['hello', 'world'];
  print(strArr);  
  
}

Example 2: inserting elements to integer array dart

import 'dart:core';

void main() {
  
  List<int> intArr = [1,2,3,4,5];
  
  //adding single int to list
  intArr.add(6);
  
  //adding multiple int to list
  intArr.addAll([7,8]);
  
  //adding element or elements to specific location
  //syntax: List.insert(index,value)
  intArr.insert(0,0);
  
  //syntax: List.insertAll(index, iterable_list_of _values)
  intArr.insertAll(0,[-2,-1]); 
  
}

Example 3: dart have array

import 'dart:convert';
void main() { 
   var arr = new List(5);// creates an empty array of length 5
   // assigning values to all the indices
   arr[0] = 'a'; 
   arr[1] = 'b'; 
   arr[2] = 'c'; 
   arr[3] = 'd'; 
   arr[4] = 'e';  
   print(arr); 
}

Example 4: get single element from list in dart

var firstList = [1,2,3,4,5,6]; print(firstList.firstWhere((i) => i < 4)); // 1  var sList = ['one', 'two', 'three', 'four']; print(sList.firstWhere((i) => i.length > 3)); // three

Example 5: list dart

var fixedLengthList = List<int>.filled(5, 0);
fixedLengthList.length = 0;  // Error
fixedLengthList.add(499);    // Error
fixedLengthList[0] = 87;
var growableList = [1, 2];
growableList.length = 0;
growableList.add(499);
growableList[0] = 87;