Abstract
You use extensions when you want to add methods and computed properties to a class, structure, or enumeration that already exists. This comes in handy when you want new behavior for a type but only in a particular context. Extensions will remind Objective-C programmers of categories.
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© 2014 Matthew Campbell
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Campbell, M. (2014). Extensions. In: Swift Quick Syntax Reference. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-0439-9_45
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DOI: https://doi.org/10.1007/978-1-4842-0439-9_45
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Publisher Name: Apress, Berkeley, CA
Print ISBN: 978-1-4842-0440-5
Online ISBN: 978-1-4842-0439-9
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