From 2e66cb3083ba46bd4648758f95309ef215e4b108 Mon Sep 17 00:00:00 2001
From: "Alex A. Naanou" <alex.nanou@gmail.com>
Date: Sat, 26 Dec 2020 07:27:23 +0300
Subject: [PATCH] started work on ObjectWithAutoKeys(..)...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
---
 containers.js | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/containers.js b/containers.js
index 04b11c6..2431ee2 100644
--- a/containers.js
+++ b/containers.js
@@ -175,6 +175,34 @@ object.Constructor('UniqueKeyMap', Map, {
 })
 
 
+//---------------------------------------------------------------------
+
+// XXX should this be a map???
+// XXX make two variants: ordered and unordered...
+var ObjectWithAutoKeys = 
+module.ObjectWithAutoKeys = 
+object.Constructor('ObjectWithAutoKeys', {
+
+	__last_key: null,
+	__new_key__: function(value){
+		return (this.__last_key = (this.__last_key || -1) + 1) },
+
+	// 
+	// 	.push(value)
+	// 		-> key
+	//
+	// 	.push(value, ..)
+	// 		-> [key, ..]
+	push: function(...values){
+		var that = this
+		var res = values
+			.map(function(value){
+				that[that.__new_key__(value)] = value })
+		return values.length == 1 ?
+   			res.pop()
+			: res },
+})
+
 
 
 /**********************************************************************