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abstract fun at(i: I): Lens<S, A>

Get a Lens for a structure S with focus in A at index i.

Lens with a focus in A at given index I.

index I to zoom into S and find focus A

open fun <T> Lens<T, S>.at(i: I): Lens<T, A>

DSL to compose At with a Lens for a structure S to focus in on A at given index I.

Lens with a focus in S

Lens with a focus in A at given index I.

index I to zoom into S and find focus A

open fun <T> Optional<T, S>.at(i: I): Optional<T, A>

DSL to compose At with an Optional for a structure S to focus in on A at given index I.

Optional with a focus in S

Optional with a focus in A at given index I.

index I to zoom into S and find focus A

open fun <T> Traversal<T, S>.at(i: I): Traversal<T, A>

DSL to compose At with a Traversal for a structure S to focus in on A at given index I.

Traversal with a focus in S

Traversal with a focus in A at given index I.

index I to zoom into S and find focus A