Lifting
Lifting transforms a value, function, or operation so it can participate in computations within a computational context.
Functional Programming in JavaScript
The transformation of a value or operation into a context so it can participate in computations of that context.
- How it is used
- Uses lifting to apply ordinary functions safely within Maybe-based error-handling computations.
- How deep it goes
- Defines lifting with a small JavaScript helper and connects it to containers, map, and monadic data flow.
- Examples
- Demonstrates lift with Maybe.fromNullable, console.log, composition, and safe object lookup.
- What you can do after
- Apply lifting to keep nullable results inside Maybe and compose functions without explicit null checks.
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Functional Design and Architecture: Examples in Haskell
lift is a monad-transformer operation that embeds an action from an underlying monad into a transformed monad.
- How it is used
- Adapts IO and lower-layer state actions for execution inside StateT-based application scripts.
- How deep it goes
- Demonstrates single and double lifting with typed Minesweeper and ship-control stacks, while deferring implementation internals.
- Examples
- Uses Minesweeper board updates, nested score and board state, and spaceship rotation scripts.
- What you can do after
- Build it from scratch by embedding underlying actions and running them through layered StateT computations.
Read how Functional Design and Architecture: Examples in Haskell explains lifting →
Related concepts
- functional, stateless philosophyuses · Functional programming is a programming paradigm that expresses computation through the evaluation and composition of functions, typically favoring immutable data and minimizing mutable state and side effects.
- monaduses · A monad is a functional abstraction that encapsulates computational context and provides operations for composing computations while preserving that context.
- optionuses · An option type is a type that explicitly represents either a value of a specified type or the absence of a value.
- functionproduces · A function is a defined operation that maps inputs to outputs and, when implemented as a callable program unit, may also produce effects.
- StateTuses · StateT is a Haskell monad transformer that threads and updates state through computations in an underlying monad.
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