WordCount - Functional

wordcount.functional.js

var paragraph = 'How much wood would a woodchuck chuck\nIf a woodchuck could chuck wood?\nHe would chuck, he would, as much as he could,\nAnd chuck as much as a woodchuck would\nIf a woodchuck could chuck wood.';

var paraCount = paragraph.split('\n')
.reduce(joinArray)
.replace(/[^\w\s]/g, '')
.split(/\s+/)
.reduce(wordCount, {});

function joinArray(last, now) {	
	return last.toLowerCase().concat(' ' + now.toLowerCase());
}

function wordCount(map, word) {
	map[word] = (map[word] || 0) + 1;	
	return map;
}

console.log(paraCount);