Object.stringify

JS version of JSON.stringify, that stringifies also regular expressions,
dates and functions

object/index.js

@@ -35,6 +35,7 @@ module.exports = {
 	safeTraverse:     require('./safe-traverse'),
 	setPrototypeOf:   require('./set-prototype-of'),
 	some:             require('./some'),
+	stringify:        require('./stringify'),
 	toArray:          require('./to-array'),
 	validCallable:    require('./valid-callable'),
 	validObject:      require('./valid-object'),

object/stringify.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var toArray  = require('./to-array')
+  , isDate   = require('../date/is-date')
+  , isRegExp = require('../reg-exp/is-reg-exp')
+
+  , isArray = Array.isArray, stringify = JSON.stringify
+  , keyValueToString = function (value, key) { return stringify(key) + ':' + exports(value); };
+
+module.exports = exports = function (obj) {
+	if (obj == null) return String(obj);
+	switch (typeof obj) {
+	case 'string':
+		return stringify(obj);
+	case 'number':
+	case 'boolean':
+	case 'function':
+		return String(obj);
+	default:
+		if (isArray(obj)) return '[' + obj.map(exports) + ']';
+		if (isRegExp(obj)) return String(obj);
+		if (isDate(obj)) return 'new Date(' + obj.valueOf() + ')';
+		return '{' + toArray(obj, keyValueToString) + '}';
+	}
+};

test/object/stringify.js

@@ -0,0 +1,25 @@
+'use strict';
+
+module.exports = function (t, a) {
+	var fn = function (raz, dwa) { return raz + dwa; };
+	a(t(), 'undefined', "Undefined");
+	a(t(null), 'null', "Null");
+	a(t(null), 'null', "Null");
+	a(t('raz'), '"raz"', "String");
+	a(t('raz"ddwa\ntrzy'), '"raz\\"ddwa\\ntrzy"', "String with escape");
+	a(t(false), 'false', "Booelean");
+	a(t(fn), String(fn), "Function");
+
+	a(t(/raz-dwa/g), '/raz-dwa/g', "RegExp");
+	a(t(new Date(1234567)), 'new Date(1234567)', "Date");
+	a(t([]), '[]', "Empty array");
+	a(t([undefined, false, null, 'raz"ddwa\ntrzy', fn, /raz/g, new Date(1234567), ['foo']]),
+		'[undefined,false,null,"raz\\"ddwa\\ntrzy",' + String(fn) +
+		',/raz/g,new Date(1234567),["foo"]]', "Rich Array");
+	a(t({}), '{}', "Empty object");
+	a(t({ raz: undefined, dwa: false, trzy: null, cztery: 'raz"ddwa\ntrzy', piec: fn, szesc: /raz/g,
+		siedem: new Date(1234567), osiem: ['foo', 32], dziewiec: { foo: 'bar', dwa: 343 } }),
+		'{"raz":undefined,"dwa":false,"trzy":null,"cztery":"raz\\"ddwa\\ntrzy","piec":' + String(fn) +
+		',"szesc":/raz/g,"siedem":new Date(1234567),"osiem":["foo",32],' +
+		'"dziewiec":{"foo":"bar","dwa":343}}', "Rich object");
+};