chaining.js

// Chaining

var lyrics=[
	{line:1,words:"Im a lumberjack and Im okay"},
	{line:2,words:"I sleep all night and I work all day"},
	{line:3,words:"Hes a lumberjack and hes okay"},
	{line:4,words:"He sleeps all night and he works all day"}
];

var values = _(lyrics).chain()
			.map(function(line) {
    			return line.words.split();
			})
			.flatten()
			.reduce(function(counts, word) {
    			counts[word] = (counts[word] || 0) + 1;
    			return counts;
			}, {})
			.value();