diff --git a/Makefile b/Makefile
index 39b6c56..85f4843 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
-CC = clang
-CFLAGS = -O2 -Wall -Wextra -Wno-c2x-extensions
+CC = zig cc
+CFLAGS = -O2 -std=c23 #-Wall -Wextra -Wno-c2x-extensions
 test_array:
 	$(CC) $(CFLAGS) -o test_array test_array.c libkeke_array.c
 	./test_array
diff --git a/a.out b/a.out
deleted file mode 100755
index 8d8a0f5..0000000
Binary files a/a.out and /dev/null differ
diff --git a/libkeke_array.c b/libkeke_array.c
index 30fda9b..98b4e2f 100644
--- a/libkeke_array.c
+++ b/libkeke_array.c
@@ -27,8 +27,7 @@ KekeArray *keke_array_alloc(size_t initial_len, size_t type_size) {
 
 	array->type_size = type_size;
 	array->max_len = max_len;
-	array->content = malloc(max_len * type_size);
-	memset(array->content, 0, max_len * type_size);
+	array->content = calloc(max_len, type_size);
 	return array;
 }
 
@@ -37,7 +36,6 @@ void keke_array_free(KekeArray *array) {
 	free(array);
 }
 
-
 void keke_array_set(KekeArray *array, size_t index, const void *value) {
 	if(index >= array->max_len) {
 		array->content = realloc(array->content, (array->max_len << 1) * array->type_size);
@@ -74,6 +72,11 @@ void keke_array_set_len(KekeArray *array, size_t new_len) {
 }
 
 void keke_array_insert(KekeArray *array, size_t index, const void *value) {
+	if(array->len + 1 > array->max_len) {
+		array->content = realloc(array->content, (array->max_len << 1) * array->type_size);
+		memset(array->content + array->max_len * array->type_size, 0, array->max_len * array->type_size);
+		array->max_len <<= 1;
+	}
     keke_array_set_len(array, array->len + 1);
     memmove(array->content + ((index + 1) * array->type_size), array->content + (index * array->type_size), (array->len - index - 1) * array->type_size);
     memcpy(array->content + index * array->type_size, value, array->type_size);
@@ -98,6 +101,12 @@ void keke_array_delete(KekeArray *array, size_t index) {
     memmove(array->content + (index * array->type_size), array->content + ((index + 1) * array->type_size), (array->len - index + 1) * array->type_size);
 }
 
+void keke_array_swap_delete(KekeArray *array, size_t index) {
+	size_t new_len = array->len - 1;
+	keke_swap(ARRAY_GET(array, index), ARRAY_GET(array, new_len), array->type_size);
+    keke_array_set_len(array, new_len);
+}
+
 KekeArray *keke_array_yoink(KekeArray *array, size_t start_index, size_t len) {
 	if(start_index + len >= array->len) return NULL;
 	KekeArray *ret = keke_array_alloc(len, array->type_size);
diff --git a/libkeke_symbol.c b/libkeke_symbol.c
index bbe4828..8eea560 100644
--- a/libkeke_symbol.c
+++ b/libkeke_symbol.c
@@ -1,7 +1,7 @@
 #include <stdint.h>
 #include "libkeke_symbol.h"
 
-static KekeSymbol iota = KEKE_NULL_SYMBOL + 1;
+static _Atomic KekeSymbol iota = KEKE_NULL_SYMBOL + 1;
 
 KekeSymbol keke_new_symbol() {
 	return iota++;
diff --git a/test_array.c b/test_array.c
index dd3da74..513a285 100644
--- a/test_array.c
+++ b/test_array.c
@@ -48,7 +48,7 @@ int main(void) {
     puts("Expected value:\n9, 8, 3, 2, 1, 0,");
     keke_array_foreach(array, output);
 	puts("\n");
-    
+
     const int k = 100;
     keke_array_insert(array2, 2, &k);
     puts("Expected value:\n7, 6, 100, 5, 4,");
@@ -123,7 +123,7 @@ int main(void) {
 	j = 0;
 	keke_array_reduce(array4, add, &j);
 	printf("Expected value:\n7\n%d\n\n", j);
-    
+
     keke_array_free(array);
     keke_array_free(array2);
     keke_array_free(array4);