Basic access to objects and JSON data.

config.js

var config1 = {
	local: {
		mode: 'local',
		port: 3000,
		mongo: {
			host: '127.0.0.1',
			port: 27017
		},
        connect : [3,2,1,0],
        'sock'  : [3,2,1,0]
	},
	staging: {
		mode: 'staging',
		port: 4000,
		mongo: {
			host: '127.0.0.1',
			port: 27017
		}
	}
}
//Accessing:
console.log('Config 1: '+config1.local.connect[1]);
console.log('Config 1: '+config1.local.sock[0]);
console.log('Config 1: '+config1.staging.mongo.host);

/////////
/////////

var config2 = [{
	local: {
		mode: 'local',
		port: 3000,
		mongo: {
			host: '127.0.0.1',
			port: 27017
		},
        connect : [3,2,1,0],
        'sock'  : [3,2,1,0]
	},
	staging: {
		mode: 'staging',
		port: 4000,
		mongo: {
			host: '127.0.0.1',
			port: 27017
		}
	}
}]
//Accessing:
console.log('Config 2: '+config2[0].local.connect[1]);
console.log('Config 2: '+config2[0].local.sock[0]);
console.log('Config 2: '+config2[0].staging.mongo.port);

/////////
/////////

var config3 = '{\
	"local": {\
		"mode": "local",\
		"port": "3000",\
		"mongo": {\
			"host": "127.0.0.1",\
			"port": "27017"\
		},\
        "connect" : [3,2,1,0],\
        "sock"  : [3,2,1,0]\
	}\
}';


//Accessing:
var config3 = JSON.parse(config3);
console.log('Config 3: '+config3.local.mongo.host);
console.log('Config 3: '+config3.local.sock[0]);