ProgramGuruTo clear all key-value pairs from a map in Dart, you can use the clear method. This method removes all elements from the map, leaving it empty.
We can clear all key-value pairs from a map in Dart using the clear method, which removes all elements from the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.clear method to remove all key-value pairs from the map.length property to verify that the map is empty.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3
};
// Clear all key-value pairs using clear method
myMap.clear();
// Print the length of the map
print('Length of the map after clearing: ${myMap.length}');
}Length of the map after clearing: 0
We can use the clear method on an already empty map in Dart, and it will still leave the map empty.
For example,
myMap. In this example, the map has string keys and integer values.clear method to remove all key-value pairs from the map, even though it is already empty.length property to verify that the map is still empty.void main() {
// Declare and initialize an empty map
Map<String, int> myMap = {};
// Clear the map using clear method
myMap.clear();
// Print the length of the map
print('Length of the map after clearing: ${myMap.length}');
}Length of the map after clearing: 0
We can insert key-value pairs into a map and then clear all key-value pairs using the clear method.
For example,
myMap and inserting some key-value pairs into it. In this example, the map has string keys and integer values.clear method to remove all key-value pairs from the map.length property to verify that the map is empty.void main() {
// Declare and initialize a map
Map<String, int> myMap = {};
myMap['one'] = 1;
myMap['two'] = 2;
myMap['three'] = 3;
// Clear all key-value pairs using clear method
myMap.clear();
// Print the length of the map
print('Length of the map after clearing: ${myMap.length}');
}Length of the map after clearing: 0
In this tutorial, we learned How to Clear All Key-Value Pairs from a Map in Dart language with well detailed examples.