Question

How to iterate over a list with indexes and values in Dart

Answer 1

void main() {
    final lst = ['a', 'b', 'c', 'd'];
   
    lst.asMap().forEach((i, v) {
        print('index = $i value = $v');
    });
}




/*
run:

index = 0 value = a
index = 1 value = b
index = 2 value = c
index = 3 value = d

*/

 

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Answer 2

void main(){
    final lst = ['a', 'b', 'c', 'd'];
   
    for (var i = 0; i < lst.length; i++) {
        print('index = $i value = ${lst[i]}');
    }
}




/*
run:

index = 0 value = a
index = 1 value = b
index = 2 value = c
index = 3 value = d

*/

 

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Answer 3

import 'package:collection/collection.dart';

void main() {
    final lst = ['a', 'b', 'c', 'd'];
   
    lst.forEachIndexed((i, v) {
        print('index = $i value = $v');
    });
}





/*
run:

index = 0 value = a
index = 1 value = b
index = 2 value = c
index = 3 value = d

*/

 

70+ SQL courses for beginners and professionals