How to Convert a Map to an Array of Values in Dart

How to Convert a Map to an Array of Values in Dart ?

Answer

To convert a map to an array of values in Dart, you can use the values property. This property returns an iterable of all the values in the map, which can be converted to a list.

✐ Examples

1 Converting a Map to an Array of Values Using values Property

We can convert a map to an array of values in Dart using the values property, which provides an iterable of all values in the map. We can then convert this iterable to a list.

For example,

We start by declaring and initializing a map named myMap with some key-value pairs. In this example, the map has string keys and integer values.
We use the values property to get an iterable of the values in the map.
We convert the iterable to a list using the toList method.
We store the list of values in a variable named valuesList.
We print the list of values to the console using the print function to verify the conversion.

Dart Program

void main() {
    // Declare and initialize a map
    Map<String, int> myMap = {
        'one': 1,
        'two': 2,
        'three': 3
    };

    // Convert map to an array of values
    List<int> valuesList = myMap.values.toList();

    // Print the values
    print('Values: $valuesList');
}

Output

Values: [1, 2, 3]

2 Converting an Empty Map to an Array of Values

We can also convert an empty map to an array of values in Dart using the values property, which returns an empty list when the map is empty.

For example,

We start by declaring an empty map named emptyMap with string keys and integer values.
We use the values property to get an iterable of the values in the empty map.
We convert the iterable to a list using the toList method.
We store the list of values in a variable named emptyValuesList.
We print the list of values to the console using the print function to verify that the list is empty.

Dart Program

void main() {
    // Declare an empty map
    Map<String, int> emptyMap = {};

    // Convert empty map to an array of values
    List<int> emptyValuesList = emptyMap.values.toList();

    // Print the values
    print('Values: $emptyValuesList');
}

Output

Values: []

3 Converting a Map to an Array of Values After Adding Elements

We can convert a map to an array of values in Dart after adding elements using the values property, which provides an updated iterable of all values in the map.

For example,

We start by declaring an empty map named dynamicMap with string keys and integer values.
We add some key-value pairs to the map using the map's index notation.
We use the values property to get an iterable of the values in the map after adding elements.
We convert the iterable to a list using the toList method.
We store the list of values in a variable named dynamicValuesList.
We print the list of values to the console using the print function to verify the updated list of values.

Dart Program

void main() {
    // Declare an empty map
    Map<String, int> dynamicMap = {};

    // Add elements to the map
    dynamicMap['one'] = 1;
    dynamicMap['two'] = 2;
    dynamicMap['three'] = 3;

    // Convert map to an array of values after adding elements
    List<int> dynamicValuesList = dynamicMap.values.toList();

    // Print the values
    print('Values: $dynamicValuesList');
}

Output

Values: [1, 2, 3]

Summary

In this tutorial, we learned How to Convert a Map to an Array of Values in Dart language with well detailed examples.

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