HMapLens

java.lang.Object

com.jnape.palatable.lambda.optics.lenses.HMapLens

public final class HMapLens extends Object

Lenses that operate on HMaps.

Constructor Summary

Constructors

Modifier

Constructor

Description

private

HMapLens()
Method Summary

Modifier and Type

Method

Description

static <A> Lens.Simple<HMap,Maybe<A>>

valueAt(TypeSafeKey<?,A> key)

A lens that focuses on a value at a TypeSafeKey.Simple<A> in an HMap, as a Maybe.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details
- HMapLens
  
  private HMapLens()
Method Details
- valueAt
  
  public static <A> Lens.Simple<HMap,Maybe<A>> valueAt(TypeSafeKey<?,A> key)
  
  A lens that focuses on a value at a TypeSafeKey.Simple<A> in an HMap, as a Maybe.
  
  Type Parameters:
  
  A - the value type at the key
  
  Parameters:
  
  key - the key
  
  Returns:
  
  the lens