Angularjs custom filter: Title Case

gistfile1.txt

app.filter('titlecase', function() {
    return function(input, scope) {
        var result ='';
        if (input != null && input != undefined){
            var words = input.split(' ');
            for(var i=0;i<words.length; i++){
                result = result.concat(words[i].substring(0,1).toUpperCase() + words[i].substring(1)+' ');
            } 
        } 
        return result;
    }
});