const todos = [
    {
        text: 'Order cat food',
        completed: true
    },
    {
        text: 'Clean kitchen',
        completed: false
    },
    {
        text: 'Buy food',
        completed: true
    },
    {
        text: 'Do work',
        completed: false
    },
    {
        text: 'Exercise',
        completed: true
    }
];

const showPendingNotes = function(notes) {
    return notes.filter(function(note, index) {
        if(note.completed === false) {
            return note.text
        }
    })
};

console.log(showPendingNotes(todos));