ProgramGuruTo remove key-value pairs from a map in Dart based on values, you need to iterate through the map and check each value. If the value matches the specified condition, remove the corresponding key-value pair.
We can remove key-value pairs from a map in Dart by iterating through the map and removing pairs with a specific value.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.removeWhere method. For each key-value pair, we check if the value matches the specified value 2.removeWhere method removes the key-value pair from the map.print function to verify that the key-value pairs have been removed.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3,
'four': 2
};
// Remove key-value pairs with specific value
myMap.removeWhere((key, value) => value == 2);
// Print the contents of the map
print(myMap);
}{one: 1, three: 3}We can remove key-value pairs from a map in Dart by iterating through the map and removing pairs with values within a specified range.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.removeWhere method. For each key-value pair, we check if the value falls within the specified range (e.g., between 2 and 3 inclusive).removeWhere method removes the key-value pair from the map.print function to verify that the key-value pairs have been removed.void main() {
// Declare and initialize a map
Map<String, int> myMap = {
'one': 1,
'two': 2,
'three': 3,
'four': 4
};
// Remove key-value pairs with values in the range [2, 3]
myMap.removeWhere((key, value) => value >= 2 && value <= 3);
// Print the contents of the map
print(myMap);
}{one: 1, four: 4}We can remove key-value pairs from a map in Dart by iterating through the map and removing pairs with values that meet a specified condition.
For example,
myMap with some key-value pairs. In this example, the map has string keys and string values.removeWhere method. For each key-value pair, we check if the value meets a specified condition (e.g., if the length of the string is 3).removeWhere method removes the key-value pair from the map.print function to verify that the key-value pairs have been removed.void main() {
// Declare and initialize a map
Map<String, String> myMap = {
'one': 'one',
'two': 'two',
'three': 'three',
'four': 'four'
};
// Remove key-value pairs where value length is 3
myMap.removeWhere((key, value) => value.length == 3);
// Print the contents of the map
print(myMap);
}{three: three, four: four}In this tutorial, we learned How to Remove Key-Value Pairs from a Map Based on Values in Dart language with well detailed examples.