In Swift there are 3 primary types of collections to store your data in a structured way, namely: In this article we aim to give you an overview of each. Specifically we want to show how they’re declared, illustrate the most common operations of each, provide comparisons between them where applicable and highlight the various performance considerations.

Models may be used to create tests in a variety of ways. Because testing is typically exploratory and reliant on heuristics, there is no one optimum strategy for test generation. It is usual practice to group all test derivation parameters into a package known as"test requirements,".