April 2017
Intermediate to advanced
316 pages
9h 33m
English
Content preview from Swift Functional Programming - Second Edition
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Weak versus strong immutability
Sometimes, certain properties of an object can be immutable while the others may be mutable. These types of objects are called weakly immutable. Weak immutability means that we cannot change the immutable parts of the object state even though other parts of the object may be mutable. If all properties are immutable, then the object is immutable. If the whole object cannot be mutated after its creation, the object is called strongly immutable.
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