var stuff = [
    'aaaaaaaaaaaaaaaaaaa',
    'bbbbbbbbbbbbbbbbbbb',
    'ccccccccccccccccccc',
    'ddddddddddddddddddd'
];

var dd  = {
    content: stuff.map(function(item) {
        return { text: item, pageBreak: 'after'}
    })
};