👉 A "fluid" class in programming, particularly within the context of functional programming and concurrency, refers to a type of data structure that can dynamically change its shape or size at runtime without the need for explicit conversion to or from other data types. Fluid classes enable seamless transformation between different data forms, such as converting a list into a map or vice versa, without losing data integrity or requiring manual handling of type conversions. This flexibility is achieved through the use of higher-order functions and immutable data structures, allowing developers to write more concise and maintainable code by leveraging the inherent properties of functional programming paradigms.
