Module

# Data.Scannable

- Package
- purescript-scannable
- Repository
- Risto-Stevcev/purescript-scannable

### #Scannable Source

`class Scannable f where`

The `Scannable`

class provides `scanl`

and `scanr`

functions for structures
that are not `Traversable`

.

Instances should also satisfy the following laws

If it is also a `Foldable`

then it should preserve length:

`length (scanl f init fa) == length fa`

`length (scanr (flip f) init fa) == length fa`

If it is also a `Functor`

then it behaves like `map`

if the accumulated
argument is ignored:

`scanl (\_ → f) _ fa == map f fa`

`scanr (\a _ → f a) _ fa == map f fa`

#### Members

`scanl :: forall b a. (b -> a -> b) -> b -> f a -> f b`

`scanr :: forall b a. (a -> b -> b) -> b -> f a -> f b`

#### Instances

### #scannablePreservesLength Source

`scannablePreservesLength :: forall b a f. Foldable f => Scannable f => (b -> a -> b) -> b -> f a -> Boolean`

### #scannableMapping Source

`scannableMapping :: forall b a f. Eq (f b) => Functor f => Scannable f => (a -> b) -> b -> f a -> Boolean`

### #defaultScanl Source

`defaultScanl :: forall f b a. ((a -> b -> b) -> b -> f a -> f b) -> (b -> a -> b) -> b -> f a -> f b`

### #defaultScanr Source

`defaultScanr :: forall f b a. ((b -> a -> b) -> b -> f a -> f b) -> (a -> b -> b) -> b -> f a -> f b`

- Modules
- Data.
Scannable