StrictKeyedIterable

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Interface Synopsis

trait StrictKeyedIterable implements HH\KeyedIterable<Tk, Tv> {...}

Public Methods

• ->concat<Tu super Tv>(Traversable<Tu> $traversable): Iterable<Tu>
• ->filter((function(Tv): bool) $fn): KeyedIterable<Tk, Tv>
• ->filterWithKey((function(Tk, Tv): bool) $fn): KeyedIterable<Tk, Tv>
• ->firstKey(): ?Tk
• ->firstValue(): ?Tv
• ->keys(): Iterable<Tk>
• ->lastKey(): ?Tk
• ->lastValue(): ?Tv
• ->lazy(): KeyedIterable<Tk, Tv>
• ->map<Tu>((function(Tv): Tu) $fn): KeyedIterable<Tk, Tu>
• ->mapWithKey<Tu>((function(Tk, Tv): Tu) $fn): KeyedIterable<Tk, Tu>
• ->skip(int $n): KeyedIterable<Tk, Tv>
• ->skipWhile((function(Tv): bool) $fn): KeyedIterable<Tk, Tv>
• ->slice(int $start, int $len): KeyedIterable<Tk, Tv>
• ->take(int $n): KeyedIterable<Tk, Tv>
• ->takeWhile((function(Tv): bool) $fn): KeyedIterable<Tk, Tv>
• ->toArray()
• ->toImmMap(): ImmMap<Tk, Tv>
• ->toImmSet(): ImmSet<Tv>
• ->toImmVector(): ImmVector<Tv>
• ->toKeysArray(): varray<Tk>
• ->toMap()
• ->toSet()
• ->toValuesArray(): varray<Tv>
• ->toVector()
• ->values(): Iterable<Tv>
• ->zip<Tu>(Traversable<Tu> $traversable): KeyedIterable<Tk, Pair<Tv, Tu>>

Public Methods (HH\KeyedIterable)

• ->getIterator(): KeyedIterator<Tk, Tv>
  Returns an iterator that points to beginning of the current KeyedIterable