behavior-factories defining the behaviours

behavior-factories.js

var speaker = function (state) {
    var words = state.words;

    return {
        talk: function () {
            console.log(state.name + ' says ' + words);
        }
    };
};

var walker = function (state) {
    return {
        walk: function () {
            console.log(state.name + ' is walking');
        },
        run: function () {
            console.log(state.name + ' is running');
        }
    };
};