map Iterate in Dart

In Dart, you can iterate over a map, which is equivalent to a hash in other languages. To iterate over a map, you can use a for in loop or a forEach() method.

Here's an example of iterating over a map with a for in loop:

void main() {
  Map myMap = {'apple': 1, 'banana': 2, 'orange': 3};
  
  for (var key in myMap.keys) {
    print('$key: ${myMap[key]}');
  }
}

Output:

apple: 1
banana: 2
orange: 3

In the above example, we defined a map myMap with key-value pairs. We used a for in loop to iterate over the keys of the map. For each key, we printed the key-value pair using string interpolation.

Alternatively, you can use the forEach() method to iterate over a map:

void main() {
  Map myMap = {'apple': 1, 'banana': 2, 'orange': 3};
  
  myMap.forEach((key, value) {
    print('$key: $value');
  });
}

Output:

apple: 1
banana: 2
orange: 3

In this example, we used the forEach() method on the map and passed in a function that takes two arguments: key and value. The function body just prints out the key-value pair.