Bind

Q: How deeply does Functional Design and Architecture: Examples in Haskell cover bind?

Explains nested continuations, fmap-based recursion, and unified types while deemphasizing deeper fixed-point theory.

As explained in 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.

Bind sequences a computation that produces a contextual value with a function that consumes that value and produces the next contextual computation. In free-monad code, it turns a sequence of domain actions into nested continuations while preserving one unified recipe type. section 6.3.1 section 6.3.4

Bind improves a sequential recipe in three related ways:

Replaces do-notation’s left-arrow steps with explicit >>= calls. section 6.3.1
Passes each intermediate SandwichBody to the continuation for the next action. section 6.3.1
Keeps arbitrarily long free-monad chains under the common type SandwichRecipe a instead of growing nested action types. section 6.3.4

A sandwich recipe

mySandwich2 = startNewSandwich Toast Tomato >>= (\body1 -> addComponent Cheese body1 >>= (\body2 -> addComponent Salt body2 >>= (\body3 -> finishSandwich (Just Toast) body3))) section 6.3.1

mySandwich3 :: SandwichRecipe Sandwich
mySandwich3
   = startNewSandwich Toast Tomato
 >>= addComponent Cheese
 >>= addComponent Salt
 >>= finishSandwich (Just Toast)

Compare explicit nested lambdas with partial application: the same bind chain becomes shorter without losing its sequencing behavior. section 6.3.1

How Functional Design and Architecture: Examples in Haskell covers it

Cover of Functional Design and Architecture: Examples in Haskell

liveBook manning.com

Read Functional Design and Architecture: Examples in Haskell on liveBook Get the book at manning.com

Also explained in

liveBook manning.com

Fabulous Adventures in Data Structures and AlgorithmsBind is an operation that chains a context-producing function to a contextual value while flattening the resulting nested context.
liveBook manning.com

Learn Haskell by Examplebind is the Monad operation that applies a function to the value produced by a monadic computation and returns the resulting monadic computation.
liveBook manning.com

Functional Programming in Scala, Second EditionBind is a computation combinator that runs a computation and feeds its result to a function producing the next computation.
liveBook manning.com

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.

Compare how 5 books explain 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.

This explainer was generated by Manning's knowledge graph from the text of Functional Design and Architecture: Examples in Haskell. The section links point to the parts of the book it draws on.