var data=[{
	id:'2a345',
	name:'test',
	poll:[{id:4},{id:5}]
},{
	id:'3b329',
	name:'prod',
	poll:[{id:2},{id:7}]
}];

var data_nested=[{
		id:'2a345',
		name:'test',
		poll:[{id:'2a54',inner:[{id:1},{id:8}]},{id:'3a54',inner:[{id:2},{id:9}]}]
	},{
		id:'3b329',
		name:'prod',
		poll:[{id:'2a32',inner:[{id:2},{id:7}]},{id:'3a32',inner:[{id:3},{id:6}]}]
	}
];


//factory to curry function
var findPollById=function(id,poll){
	return function(poll){
		return poll.id===id;
	}
};

var flattenMap=function(prop){
	return function(prev,curr){
		return [].concat.apply(prev,curr[prop]);
	}
}

function findPoll(id){
	return data
	.reduce(flattenMap('poll'),[])
	.find(findPollById(id));
}

function findInner(id){
	return data_nested
	.reduce(flattenMap('poll'),[])
	.reduce(flattenMap('inner'),[])
	.find(findPollById(id));
}

var poll=findPoll(4);
var inner=findInner(2);

console.log(poll);
console.log(inner);