findOnlyOncePair

gistfile1.js

function remainFreqenceEqual(data, frequence){
	console.log('remainFreqenceEqual');
	frequence = frequence || 1;
	return _.chain(data)
	.reduce(function (acc, freq) {
		console.log('acc');
		console.log(acc);
	  	acc[freq] = typeof acc[freq] == 'undefined' ? 1 : acc[freq]+1;
	  	return acc;
	}, {})
	.map(function(num, key) {
		console.log(num + ',' + key);
		return {
			key: key,
			frequence: num
		}
	})
	.filter(function(obj) {
		console.log('obj');
		console.log(obj);
		return obj.frequence === frequence;
	})
	.pluck('key')
	.value();
}


function parsePairToString(data){
	console.log('parsePairToString');
	return _.chain(data)
	.flatten(data,true)
	.map(function(obj) {
		return obj.toString();
	})
	.value();
}

function parseStringToPair(data){
	console.log('parseStringToPair');
	return _.map(data, function(obj) {
		var arr = obj.split(',');
		return [parseFloat(arr[0]), parseFloat(arr[1])]
	});
};

function findOnlyOncePair(data){
	data = parsePairToString(data);
	console.log(data);
	data = remainFreqenceEqual(data);
	console.log(data);
	data = parseStringToPair(data);
	console.log(data);
	return data;	
}


var data = [
	[[1,1],[1,2]],
	[[1,2],[2,4]],
	[[1,1],[2,2]]
];

findOnlyOncePair(data);