Initial version

Rather naïve implementation of stringify only (no going back).

README.md

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+hstore for Node.js
+==================
+
+[Node.js][] module for transforming JavaScript objects to [hstore][]
+format as used by [PostgreSQL][].
+
+This can be used to store key/value pairs in a format recognized by the
+database, so you can query them via SQL.
+
+[Node.js]: http://nodejs.org/
+[hstore]: http://www.postgresql.org/docs/current/interactive/hstore.html
+[PostgreSQL]: http://www.postgresql.org/
+

hstore.js

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+/**
+ * Module for converting JavaScript objects to hstore format.
+ */
+
+var hstore = {};
+
+"use strict";
+
+/**
+ * Convert an arbitrary value to string.
+ */
+function convertToString(value) {
+  switch (typeof value) {
+    case 'boolean':
+      return String(value);
+    case 'null':
+      return 'NULL';
+    case 'number':
+      return isFinite(value) ? String(value) : 'NULL'
+    case 'string':
+      return quoteString(value);
+  }
+}
+
+/**
+ * Quote a string.
+ */
+function quoteString(string) {
+  // Naïve quoting of strings. Assumes there's not quotes in the string.
+  return '"' + string + '"';
+}
+
+/**
+ * Convert JavaScript object to hstore format.
+ */
+hstore.stringify = function (data) {
+  pairs = [];
+
+  Object.keys(data).forEach(function (key) {
+    var value = convertToString(data[key]);
+
+    if (value) {
+      pairs.push('"' + key + '"=>' + value);
+    }
+  });
+
+  return pairs.join();
+};
+
+module.exports = hstore;
+

package.json

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+{
+  "author": "Mikkel Hoegh <mikkel@hoegh.org> (http://mikkel.hoegh.org/)",
+  "name": "hstore",
+  "description": "Library for transforming JavaScript objects to hstore format, used by the PostgreSQL RDBMS.",
+  "keywords" : ["postgres", "postgre", "database", "rdbms"],
+  "main" : "hstore.js",
+  "version": "0.0.1",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/mikl/node-hstore.git"
+  },
+  "engines": {
+    "node": "~v0.4.10"
+  },
+  "dependencies": {},
+  "devDependencies": {}
+}