Bind
Bind is a monadic operation that sequences a context-bearing computation with a function producing the next computation while flattening the resulting nested context.
Fabulous Adventures in Data Structures and Algorithms
Bind is an operation that chains a context-producing function to a contextual value while flattening the resulting nested context.
- How it is used
- Chains functions that return contextual values without leaving an unwanted nested context.
- How deep it goes
- Defines the generic signature and works through nullable, lazy, task, sequence, and discrete-distribution implementations.
- Examples
- Uses nested lazy values, sequence flattening, and a cold-and-sneezing probability calculation.
- What you can do after
- Build it from scratch for contextual workflows, or apply it via C# SelectMany for sequences.
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Learn Haskell by Example
bind is the Monad operation that applies a function to the value produced by a monadic computation and returns the resulting monadic computation.
- How it is used
- Sequences dependent parsing steps while preserving parser failures and remaining input.
- How deep it goes
- Defines bind’s type, demonstrates Maybe behavior and do notation, and implements it for Parser.
- Examples
- Demonstrates chained Maybe arithmetic, monadic addition, Hello World parsing, integer parsing, and PNM header parsing.
- What you can do after
- Apply it via Haskell’s (>>=) and do notation to compose dependent Maybe and Parser computations.
Functional Programming in Scala, Second Edition
Bind is a computation combinator that runs a computation and feeds its result to a function producing the next computation.
- How it is used
- Sequences parallel computations by generating the next computation from the first computation's result.
- How deep it goes
- Explains the signature, operational meaning, and decomposition into map plus join, then stops at implementation exercises.
- Examples
- Uses choice, chooser, nested Par values, and implementation challenges involving join, flatMap, and map2.
- What you can do after
- Build from scratch: implement join and derive flatMap or map2 from the parallel-computation primitives.
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F# in Action: A Revised Edition of Get Programming with F#
bind is a function that applies a computation producing an optional or effectful result and avoids nesting the result within the same computational context.
- How it is used
- Composes sequential computations while preserving option, result, task, or collection effects.
- How deep it goes
- Explains effect-aware behavior and flattening through Option, Result, Task, and List examples, without implementation internals.
- Examples
- Demonstrates safe division with Result.bind and customer-order flattening with List.collect.
- What you can do after
- Apply bind to chain optional or failing operations without manually unwrapping and rewrapping their contexts.
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Functional Design and Architecture: Examples in Haskell
Bind is the monadic operation that sequences a computation producing a contextual value with a function that consumes that value and produces the next contextual computation.
- How it is used
- Sequences domain actions inside a free-monad recipe.
- How deep it goes
- Explains nested continuations, fmap-based recursion, and unified types while deemphasizing deeper fixed-point theory.
- Examples
- Uses a sandwich recipe that starts bread, adds cheese and salt, and finishes with optional bread.
- What you can do after
- Build it from scratch by expressing and simplifying sequential free-monad computations with bind.
Read how Functional Design and Architecture: Examples in Haskell explains bind →
Related concepts
- flatmapequivalent to · FlatMap is an operation that applies a function producing nested collections or computational contexts to each element and combines the resulting contexts into one flattened result.
- do notationequivalent to · Do notation is Haskell syntax for sequencing monadic computations and binding their intermediate results in a readable, imperative-like form.
- mapimplements · An operation that applies a function to values in a collection or computational context, producing corresponding results while preserving the collection or context’s structure.
- fmapuses · Fmap is an operation that applies a function to values within a functor while preserving the functor’s structure.
- monadused by · A monad is a functional abstraction that encapsulates computational context and provides operations for composing computations while preserving that context.
- computation expressionused by · A computation expression is F# syntax and builder-based semantics for sequencing computations that carry an effect such as optionality, failure, or asynchrony.
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