Counts words & sorts them by number of occurences

count-words.js

var fileToTest = grunt.file.read('somefile.js');
var vars = fileToTest.match(/(\w+)/g);

var i = vars.length;
var count;
var parsedVars = [];
var maxWordLen = 3;

while(i--) {
	var word = vars[i];
	if(word !== undefined) {
		count = 0;
		vars = vars.filter(function (a){
			if(a === word) {
				count++;
			}
			return a !== word;
		});
		// only words with length more than 3
		if(word.length > maxWordLen) {
			parsedVars.push({
				word: word,
				count: count
			});
		}
	}
}

var sortedVars = parsedVars.sort(function (a, b) {
	return b.count - a.count;
});

sortedVars.forEach(function(item) {
	grunt.log.writeln(item.word + ' ' + item.count);
});