Dart Collections: Map Operations | Map Extensions | Map Methods
I'm Computer Engineering Student. Learning Status DSA in Java, Dart Development, Python in Django Development. Best part is Communication Skills, Marketing, Accounting.
Certainly! Here are some common operations, extensions, and methods related to Dart Maps:
Map Operations:
Accessing Elements:
Access a value by its key:
map[key].Check if a key exists:
map.containsKey(key).
Adding and Updating Elements:
Add or update a key-value pair:
map[key] = value.Add multiple key-value pairs:
map.addAll(otherMap).
Removing Elements:
Remove a key and its associated value:
map.remove(key).Remove all elements:
map.clear().
Map Extensions:
Map Transformation:
mapKeys: Transforms the map by applying a function to all keys.mapValues: Transforms the map by applying a function to all values.addAll: Combines two maps by adding all key-value pairs from another map.
Filtering:
where: Filters the map entries based on a predicate function.
Sorting:
keysSortedBy: Returns a list of keys sorted according to the natural order of the values.
Map Methods:
Iterating Over Elements:
forEach: Applies a function to each key-value pair in the map.
Querying Map Properties:
isEmpty: Checks if the map is empty.isNotEmpty: Checks if the map is not empty.length: Returns the number of key-value pairs in the map.
Converting to Other Data Structures:
keys: Returns an iterable containing all keys.values: Returns an iterable containing all values.entries: Returns an iterable containing all key-value pairs.
Copying and Merging Maps:
clone: Creates a shallow copy of the map.update: Updates the map with key-value pairs from another map, optionally applying a function to merge values for keys that exist in both maps.
These operations, extensions, and methods provide a variety of ways to work with Dart Maps, enabling you to perform common tasks such as accessing, modifying, and transforming map data efficiently.
