Relax.js is a way to have map and reduce couchdb like functions in the browser.

Relax.js don't connect with couchdb, don't execute views or anything like that (use $.couch for kind of things).

There are times when you have been writing and debuging couchdb views all day. Then, you face a problem in your client code, and think that having a map function just like the one in couchdb will solve the problem. Well, you have Relax.js for that :)

###The docs:

var docs =[{
		country:{
			name:"Italy",
			cities:[
				{
					name:'Rome'
				},
				{
					name:'Milan'
				},
				{
					name:'Venezia'
				},
			]
		},
	},
	{
		country:{
			name:"Spain",
			cities:[
				{
					name:'Madrid'
				},
				{
					name:'Barcelona'
				},
				{
					name:'Sevilla'
				},
			]
		}
	}
];

So, we have 2 documents, each with a country object, and inside that object a name and an array of cities.

###The map function

	relax.map(docs, function(doc){
		doc.country.cities.forEach(function(city){
			emit([doc.country.name, city.name]);
		});
	});

Here we emit once for every city, where the emitted key is an array containing the country name and the city name

###Result

[
	{"key":["Italy","Milan"] , "value":null},	
	{"key":["Italy","Rome"] , "value":null},
	{"key":["Italy","Venezia"] , "value":null},
	{"key":["Spain","Barcelona"] , "value":null},
	{"key":["Spain","Madrid"] , "value":null},
	{"key":["Spain","Sevilla"] , "value":null}
]

###Emiting values

We a little change in the map function:

	relax.map(docs, function(doc){
		doc.country.cities.forEach(function(city){
			emit(doc.country.name, city.name]);
		});
	});

the result will be:

[
	{"key":"Italy" , "value":"Milan"},
	{"key":"Italy" , "value":"Rome"},
	{"key":"Italy" , "value":"Venezia"},
	{"key":"Spain" , "value":"Barcelona"},
	{"key":"Spain" , "value":"Madrid"},
	{"key":"Spain" , "value":"Sevilla"}
]

• couchdb like map
• couchdb like reduce (no docs yet, but you can explore the tests

• Make the results for both function get sorted just like couchdb would sort them
• There are more ToDo tasks in the issues