thisful

function Programmer() {
    this.languages = [];
}

Programmer.prototype.learnNewLanguage = function(lang) {
    this.languages.push(lang);
};

Programmer.prototype.isPragmatic = function() {
    return this.languages.length >= 3;
};

var programmer = new Programmer();

programmer.learnNewLanguage("Clojure");
programmer.learnNewLanguage("Java");
programmer.learnNewLanguage("Go");

console.log(programmer.isPragmatic());