diff --git a/docs/component/vec.md b/docs/component/vec.md
index 685d86bf7..d545e7534 100644
--- a/docs/component/vec.md
+++ b/docs/component/vec.md
@@ -17,13 +17,13 @@
 - [concat](./../../src/Psl/Vec/concat.php#L17)
 - [enumerate](./../../src/Psl/Vec/enumerate.php#L17)
 - [fill](./../../src/Psl/Vec/fill.php#L24)
-- [filter](./../../src/Psl/Vec/filter.php#L30)
-- [filter_keys](./../../src/Psl/Vec/filter_keys.php#L31)
+- [filter](./../../src/Psl/Vec/filter.php#L34)
+- [filter_keys](./../../src/Psl/Vec/filter_keys.php#L37)
 - [filter_nulls](./../../src/Psl/Vec/filter_nulls.php#L20)
-- [filter_with_key](./../../src/Psl/Vec/filter_with_key.php#L34)
+- [filter_with_key](./../../src/Psl/Vec/filter_with_key.php#L40)
 - [flat_map](./../../src/Psl/Vec/flat_map.php#L16)
 - [keys](./../../src/Psl/Vec/keys.php#L20)
-- [map](./../../src/Psl/Vec/map.php#L27)
+- [map](./../../src/Psl/Vec/map.php#L31)
 - [map_with_key](./../../src/Psl/Vec/map_with_key.php#L27)
 - [partition](./../../src/Psl/Vec/partition.php#L18)
 - [range](./../../src/Psl/Vec/range.php#L50)
diff --git a/src/Psl/Dict/filter.php b/src/Psl/Dict/filter.php
index 138be908a..a5696e771 100644
--- a/src/Psl/Dict/filter.php
+++ b/src/Psl/Dict/filter.php
@@ -37,7 +37,13 @@ function filter(iterable $iterable, ?callable $predicate = null): array
     $predicate = $predicate ?? Closure::fromCallable('Psl\Internal\boolean');
 
     if (is_array($iterable)) {
-        return array_filter($iterable, $predicate);
+        return array_filter(
+            $iterable,
+            /**
+             * @param Tv $v
+             */
+            static fn($v): bool => $predicate($v)
+        );
     }
 
     $result    = [];
diff --git a/src/Psl/Dict/filter_keys.php b/src/Psl/Dict/filter_keys.php
index cb10ef17b..1e15e9d1e 100644
--- a/src/Psl/Dict/filter_keys.php
+++ b/src/Psl/Dict/filter_keys.php
@@ -39,7 +39,14 @@ function filter_keys(iterable $iterable, ?callable $predicate = null): array
     $predicate = $predicate ?? Closure::fromCallable('Psl\Internal\boolean');
 
     if (is_array($iterable)) {
-        return array_filter($iterable, $predicate, ARRAY_FILTER_USE_KEY);
+        return array_filter(
+            $iterable,
+            /**
+             * @param Tk $k
+             */
+            static fn($k): bool => $predicate($k),
+            ARRAY_FILTER_USE_KEY
+        );
     }
 
     $result    = [];
diff --git a/src/Psl/Iter/contains_key.php b/src/Psl/Iter/contains_key.php
index 35376d905..ae29cdc98 100644
--- a/src/Psl/Iter/contains_key.php
+++ b/src/Psl/Iter/contains_key.php
@@ -10,7 +10,7 @@
  * @template Tk
  * @template Tv
  *
- * @param iterable<Tk, Tv> $iterable,
+ * @param iterable<Tk, Tv> $iterable
  * @param Tk $key
  */
 function contains_key(iterable $iterable, $key): bool
diff --git a/src/Psl/Vec/filter.php b/src/Psl/Vec/filter.php
index 226bd797e..2960fc62d 100644
--- a/src/Psl/Vec/filter.php
+++ b/src/Psl/Vec/filter.php
@@ -6,6 +6,10 @@
 
 use Closure;
 
+use function array_filter;
+use function array_values;
+use function is_array;
+
 /**
  * Returns a vec containing only the values for which the given predicate
  * returns `true`.
@@ -31,6 +35,16 @@ function filter(iterable $iterable, ?callable $predicate = null): array
 {
     /** @var (callable(T): bool) $predicate */
     $predicate = $predicate ?? Closure::fromCallable('Psl\Internal\boolean');
+    if (is_array($iterable)) {
+        return array_values(array_filter(
+            $iterable,
+            /**
+             * @param T $t
+             */
+            static fn($t): bool => $predicate($t)
+        ));
+    }
+
     $result    = [];
     foreach ($iterable as $v) {
         if ($predicate($v)) {
diff --git a/src/Psl/Vec/filter_keys.php b/src/Psl/Vec/filter_keys.php
index aebf5ae72..54b4ba745 100644
--- a/src/Psl/Vec/filter_keys.php
+++ b/src/Psl/Vec/filter_keys.php
@@ -6,6 +6,12 @@
 
 use Closure;
 
+use function array_filter;
+use function array_values;
+use function is_array;
+
+use const ARRAY_FILTER_USE_KEY;
+
 /**
  * Returns a vec containing only the values for which the given predicate
  * returns `true`.
@@ -32,6 +38,17 @@ function filter_keys(iterable $iterable, ?callable $predicate = null): array
 {
     /** @var (callable(Tk): bool) $predicate */
     $predicate = $predicate ?? Closure::fromCallable('Psl\Internal\boolean');
+    if (is_array($iterable)) {
+        return array_values(array_filter(
+            $iterable,
+            /**
+             * @param Tk $t
+             */
+            static fn($t): bool => $predicate($t),
+            ARRAY_FILTER_USE_KEY
+        ));
+    }
+
     $result    = [];
     foreach ($iterable as $k => $v) {
         if ($predicate($k)) {
diff --git a/src/Psl/Vec/filter_nulls.php b/src/Psl/Vec/filter_nulls.php
index 5fc8aa169..fd0cc4c65 100644
--- a/src/Psl/Vec/filter_nulls.php
+++ b/src/Psl/Vec/filter_nulls.php
@@ -19,13 +19,12 @@
  */
 function filter_nulls(iterable $iterable): array
 {
-    /** @var list<T> $result */
-    $result = [];
-    foreach ($iterable as $value) {
-        if (null !== $value) {
-            $result[] = $value;
-        }
-    }
-
-    return $result;
+    /** @var list<T> */
+    return filter(
+        $iterable,
+        /**
+         * @param T|null $value
+         */
+        static fn($value): bool => null !== $value
+    );
 }
diff --git a/src/Psl/Vec/filter_with_key.php b/src/Psl/Vec/filter_with_key.php
index 69fcede05..fca36f5dc 100644
--- a/src/Psl/Vec/filter_with_key.php
+++ b/src/Psl/Vec/filter_with_key.php
@@ -6,6 +6,12 @@
 
 use Psl;
 
+use function array_filter;
+use function array_values;
+use function is_array;
+
+use const ARRAY_FILTER_USE_BOTH;
+
 /**
  * Returns a vec containing only the values for which the given predicate
  * returns `true`.
@@ -40,6 +46,18 @@ function filter_with_key(iterable $iterable, ?callable $predicate = null): array
          */
         static fn ($_k, $v): bool => Psl\Internal\boolean($v);
 
+    if (is_array($iterable)) {
+        return array_values(array_filter(
+            $iterable,
+            /**
+             * @param Tv $v
+             * @param Tk $k
+             */
+            static fn($v, $k): bool => $predicate($k, $v),
+            ARRAY_FILTER_USE_BOTH
+        ));
+    }
+
     $result = [];
     foreach ($iterable as $k => $v) {
         if ($predicate($k, $v)) {
diff --git a/src/Psl/Vec/map.php b/src/Psl/Vec/map.php
index 7c42d6b7c..6e41a1b28 100644
--- a/src/Psl/Vec/map.php
+++ b/src/Psl/Vec/map.php
@@ -4,6 +4,10 @@
 
 namespace Psl\Vec;
 
+use function array_map;
+use function array_values;
+use function is_array;
+
 /**
  * Applies a mapping function to all values of an iterable.
  *
@@ -26,6 +30,16 @@
  */
 function map(iterable $iterable, callable $function): array
 {
+    if (is_array($iterable)) {
+        return array_values(array_map(
+            /**
+             * @param Tv $v
+             */
+            static fn($v) => $function($v),
+            $iterable
+        ));
+    }
+
     $result = [];
     foreach ($iterable as $value) {
         $result[] = $function($value);