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JavaScript arrays
JavaScript arrays keep several values in a sequence. They are useful when your idea involves a list of things rather than one isolated value.
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A shopping list, a set of quiz answers, and a queue of tasks all need a way to organize multiple items. Arrays are one of the building blocks behind these familiar features.
A collection changes as people use an interface
An array keeps values in an ordered collection. A filtered list of products and a queue of upcoming tracks both involve several items, but the meaning of their order differs. Arrays provide the collection; the app gives that collection its purpose.
The visible position of an item can change after sorting, filtering, or removal. Its identity may need to remain stable through those changes. This difference becomes useful when connecting an on-screen list to the underlying records it represents.
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