Collections
In Dart, Collections are data structures that store a group of related items. Dart provides several built-in collection types, including:
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Lists: Ordered collections of items. Lists are the most commonly used collection type in Dart.
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Sets: Unordered collections of unique items. Sets are useful when we want to store a collection of items without duplicates
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Maps: Collections of key-value pairs. Maps are useful when we want to store and retrieve data using a unique key.
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Queues: Ordered collections that support insertion at the rear and removal from the front. Queues are useful for implementing first-in, first-out (FIFO) data structures.
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Deques: Double-ended queues that support insertion and removal at both the front and the rear.
Dart’s collection types provide a wide range of methods and properties for manipulating and accessing the data they hold. For example, we can add, remove, and search for items in a List, or check the length of a Map. Collections in Dart are also strongly typed, meaning we can specify the type of elements the collection can hold.
Dart’s collection types are versatile and provide a lot of functionality for managing and manipulating data. They are essential for building complex Dart applications.