SetLens

java.lang.Object
- com.jnape.palatable.lambda.optics.lenses.SetLens

public final class SetLens
extends java.lang.Object

Lenses that operate on Sets.

Constructor Summary

Constructors
Modifier Constructor Description

private SetLens()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <A> Lens.Simple<java.util.Set<A>,java.lang.Boolean>`	`contains(A a)`	A lens that focuses on whether a `Set` contains some value `a`.
`static <A,SetA extends java.util.Set<A>> Lens.Simple<SetA,java.lang.Boolean>`	`contains(Fn1<? super SetA,? extends SetA> copyFn, A a)`	A lens that focuses on whether a `Set` contains some value `a`.

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

- Constructor Detail
  - SetLens
```
private SetLens()
```
- Method Detail
  - contains
```
public static <A,SetA extends java.util.Set<A>> Lens.Simple<SetA,java.lang.Boolean> contains(Fn1<? super SetA,? extends SetA> copyFn,
                                                                                                         A a)
```
    A lens that focuses on whether a Set contains some value a. Note that copyFn is used to avoid mutating the Set in question.
    
    Type Parameters:
    
    A - the value type
    
    SetA - the set to focus on
    
    Parameters:
    
    copyFn - the copy function
    
    a - the value in question
    
    Returns:
    
    a lens that focuses on a value's inclusion in a given Set
  - contains
```
public static <A> Lens.Simple<java.util.Set<A>,java.lang.Boolean> contains(A a)
```
    A lens that focuses on whether a Set contains some value a. Like contains(Fn1, Object) but with an implicit copy function that produces HashSets.
    
    Type Parameters:
    
    A - the value type
    
    Parameters:
    
    a - the value in question
    
    Returns:
    
    a lens that focuses on a value's inclusion in a given Set