package array

import "github.com/IBM/fp-go/optics/lens/array"

Index ¶

• func AtHead[A any]() L.Lens[[]A, O.Option[A]]

Functions ¶

func AtHead ¶

func AtHead[A any]() L.Lens[[]A, O.Option[A]]

AtHead focusses on the head of an array. The setter works as follows - if the new value is none, the result will be an empty array - if the new value is some and the array is empty, it creates a new array with one element - if the new value is some and the array is not empty, it replaces the head

Source Files ¶

head.go

Directories ¶