arrow-optics/arrow.optics.typeclasses/Index/Companion

Companion

object Companion(source)

Functions

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fun <S, A, I, B> fromIso(ID: Index<A, I, B>, iso: Iso<S, A>): Index<S, I, B>

Lift an instance of Index using an Iso.

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@JvmStatic
fun <A> list(): Index<List<A>, Int, A>

Index instance definition for List.

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@JvmStatic
fun <K, V> map(): Index<Map<K, V>, K, V>
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@JvmStatic
fun <A> nonEmptyList(): Index<NonEmptyList<A>, Int, A>

Index instance definition for NonEmptyList.

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@JvmStatic
fun string(): Index<String, Int, Char>

Index instance for String. It allows access to every Char in a String by its index's position.