diff --git a/include/arc/std/string.h b/include/arc/std/string.h
index a01d97d..3fe80e2 100644
--- a/include/arc/std/string.h
+++ b/include/arc/std/string.h
@@ -58,6 +58,17 @@ void ARC_String_Copy(ARC_String **copy, ARC_String *original);
 */
 void ARC_String_CopySubstring(ARC_String **substring, ARC_String *original, uint64_t start, uint64_t length);
 
+/**
+ * @brief replaces a string with a section of itself
+ *
+ * @note this uses ARC_String_CopySubstring so errors logs will be thrown in that function not this one
+ *
+ * @param string the string to replace, will not change on error
+ * @param start  the starting index of the substring
+ * @param length the length of the substring
+*/
+void ARC_String_ReplaceWithSubstring(ARC_String **string, uint64_t start, uint64_t length);
+
 /**
  * @brief copy a subtring from a givin ARC_String
  *
@@ -322,4 +333,4 @@ void ARC_String_ReplaceMatchingCStringWithStrlen(ARC_String **string, char *patt
 }
 #endif
 
-#endif //ARC_STD_STRING_H_
\ No newline at end of file
+#endif //ARC_STD_STRING_H_
diff --git a/src/std/config.c b/src/std/config.c
index 78b294a..726c15f 100644
--- a/src/std/config.c
+++ b/src/std/config.c
@@ -583,7 +583,7 @@ void ARC_Config_CreateGroup(ARC_Config *config, ARC_String *name){
 
 void ARC_Config_DestroyGroup(ARC_HashtableNode *group, void *userdata){
     free((char *)group->key);
-    return ARC_Hashtable_Destroy((ARC_Hashtable *)group->data, ARC_Config_DestroyGroupNode, userdata);
+    ARC_Hashtable_Destroy((ARC_Hashtable *)group->data, ARC_Config_DestroyGroupNode, userdata);
 }
 
 void ARC_Config_DestroyGroupNode(ARC_HashtableNode *node, void *userdata){
@@ -609,4 +609,4 @@ void ARC_Config_RemoveKey(ARC_HashtableNode *node, void *userdata){
     }
 
     free((ARC_ConfigKey *)node->data);
-}
\ No newline at end of file
+}
diff --git a/src/std/hashtable.c b/src/std/hashtable.c
index 6c23bfc..3a6e58b 100644
--- a/src/std/hashtable.c
+++ b/src/std/hashtable.c
@@ -28,7 +28,7 @@ void CRC32(void *key, size_t *keysize, uint32_t *hashval){
 }
 
 int8_t ARC_Default_Key_Compare(void *key1, size_t *key1size, void *key2, size_t *key2size){
-    return key1 - key2;
+    return key1 == key2;
 }
 
 void ARC_HashtableNode_Create(ARC_HashtableNode **node, void *key, size_t *keysize, void *data){
diff --git a/src/std/string.c b/src/std/string.c
index c1fa1da..9d12a5e 100644
--- a/src/std/string.c
+++ b/src/std/string.c
@@ -69,6 +69,22 @@ void ARC_String_CopySubstring(ARC_String **substring, ARC_String *original, uint
     ARC_String_Create(substring, data, length);
 }
 
+void ARC_String_ReplaceWithSubstring(ARC_String **string, uint64_t start, uint64_t length){
+    ARC_String *substring;
+    ARC_String_CopySubstring(&substring, *string, start, length);
+
+    //if error or substring is null free memory and return
+    if(arc_errno || substring == NULL){
+        if(substring != NULL){
+            free(substring);
+        }
+        return;
+    }
+
+    free(*string);
+    *string = substring;
+}
+
 void ARC_String_RemoveSubstring(ARC_String **newString, ARC_String *original, ARC_String *substring){
     uint64_t index = ARC_String_Find(original, substring);
     if(arc_errno){