diff --git a/include/tupperware/vector.h b/include/tupperware/vector.h
index 36e3fbd..6bc2c67 100644
--- a/include/tupperware/vector.h
+++ b/include/tupperware/vector.h
@@ -46,4 +46,11 @@ bool vector_heap_sort(struct vector *v, vector_cmp_f cmp, void *cookie);
 bool vector_merge_sort(struct vector *v, vector_cmp_f cmp, void *cookie);
 bool vector_sort(struct vector *v, vector_cmp_f cmp, void *cookie);
 
+typedef void (*vector_map_f)(void *v, void *cookie);
+typedef bool (*vector_filter_f)(void *v, void *cookie);
+
+bool vector_filter(struct vector *res,
+        struct vector *v, vector_filter_f filter, void *cookie);
+void vector_map(struct vector *v, vector_map_f map, void *cookie);
+
 #endif /* !TUPPERWARE_VECTOR_H */
diff --git a/src/vector.c b/src/vector.c
index 9d9e9c0..6c21681 100644
--- a/src/vector.c
+++ b/src/vector.c
@@ -569,3 +569,30 @@ bool vector_sort(struct vector *v, vector_cmp_f cmp, void *cookie) {
 
     return true;
 }
+
+bool vector_filter(struct vector *res,
+        struct vector *v, vector_filter_f filter, void *cookie) {
+    if (!v || !res)
+        return false;
+
+    for (size_t i = 0; i < v->nmemb; ++i) {
+        void *elem = VEC_AT(v, i);
+        if (!filter(elem, cookie))
+            continue;
+        if (!vector_push_back(res, elem) || !vector_pop_at(v, NULL, i))
+            return false; // Undefined state at this point...
+        --i; // We need to see the new element at the same index
+    }
+
+    return true;
+}
+
+void vector_map(struct vector *v, vector_map_f map, void *cookie) {
+    if (!v)
+        return;
+
+    for (size_t i = 0; i < v->nmemb; ++i) {
+        void *elem = VEC_AT(v, i);
+        map(elem, cookie);
+    }
+}