functional

README

functional-go

Documentation

Index

• func FoldLeft[FA Foldable[A], A any, B any](foldable FA, initial B, foldFn func(elem A, state B) B) B
• type FoldLeftFn
• type Foldable
• type Monoid
• type Semigroup
• type Slice
  • func (s Slice[A]) FoldLeft(fn FoldLeftFn[A])

Examples

• Slice.FoldLeft

Functions

func FoldLeft

func FoldLeft[FA Foldable[A], A any, B any](foldable FA, initial B, foldFn func(elem A, state B) B) B

Types

type FoldLeftFn

type FoldLeftFn[A any] interface {
	Next(elem A)
}

type Foldable

type Foldable[A any] interface {
	FoldLeft(fn FoldLeftFn[A])
}

type Monoid

type Monoid[A any] interface {
	Semigroup[A]
	Empty() A
}

type Semigroup

type Semigroup[A any] interface {
	Combine(x A, y A) A
}

type Slice

type Slice[A any] []A

func (Slice[A]) FoldLeft

func (s Slice[A]) FoldLeft(fn FoldLeftFn[A])

Example

s := Slice[int]{1, 2, 3, 4}
r := FoldLeft(s, 10, func(elem int, state int) int {
	fmt.Println(elem, state)
	return elem + state
})
fmt.Println("=", r)

Output:

1 10
2 11
3 13
4 16
= 20