ProgramGuruTo iterate over entries (key-value pairs) in a map in Dart, you can use the entries property along with a for loop or the forEach method. This allows you to access each key-value pair in the map.
We can iterate over entries in a map in Dart using a for loop with the entries property, which provides a convenient syntax for iterating over all key-value pairs in the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.entries property to get an iterable of the key-value pairs in the map.print function to verify that we are iterating over all entries.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3
};
// Iterate over entries using for loop
for (var entry in myMap.entries) {
print('Key: ${entry.key}, Value: ${entry.value}');
}
}Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
We can iterate over entries in a map in Dart using the forEach method, which provides a flexible way to access each key-value pair in the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.forEach method to iterate over the key-value pairs in the map.forEach, we access each key and value.print function to verify that we are iterating over all entries.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3
};
// Iterate over entries using forEach method
myMap.forEach((key, value) {
print('Key: $key, Value: $value');
});
}Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
We can store entries in a separate list and then iterate over the list in Dart, which provides a way to work with key-value pairs independently of the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.entries to store the key-value pairs from the map.entries property to get an iterable of the key-value pairs in the map and convert it to a list using the toList method.entries list and print each key and value to the console using the print function to verify that we have stored all entries separately.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3
};
// Store entries in a separate list
List<MapEntry<String, int>> entries = myMap.entries.toList();
// Iterate over the entries list
for (var entry in entries) {
print('Key: ${entry.key}, Value: ${entry.value}');
}
}Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
In this tutorial, we learned How to Iterate Over Entries (Key-Value Pairs) in a Map in Dart language with well detailed examples.