JavaScript
var buildComputer = function (memory, display, processor) {
var computer = {
basicPrice: 5000,
processor: processor,
display: display,
memory: memory
};
return computer;
};
var myComputer = buildComputer(8, 13, 'i7');
console.log(myComputer);
Thanks! We’ll fix everything at once!
Result
- Add the getDescription method, which returns the 'computer' line, to the computer object.
- Instead of logging variable myComputer in the console, log message 'In the cart ' + myComputer.getDescription().
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</script><link rel="stylesheet" href="https://assets.htmlacademy.org/css/core.v284.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/profile.v236.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course.v246.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course-interface-light.v20.css"><link rel="stylesheet" href="https://assets.htmlacademy.org/css/course-interface-en.v2.css"><script src="https://assets.htmlacademy.org/js/sentry.js" data-sentry="3774884cc81746ed84c0ba7c5cd4ac7b" data-project="26" data-version="2"></script><link rel="stylesheet" href="/css/custom.css"><link rel="stylesheet" href="/css/cookies.css"><link rel="preload" as="script" href="https://assets.htmlacademy.org/js/general.v274.js"><title>My first method — Objects — HTML Academy</title><meta name="csrf-token" content="16964caf322823086fca37a7326b9bd2a54"><meta property="og:type" content="website"><meta property="og:site_name" content="HTML Academy"><meta name="twitter:url" property="og:url" content="https://htmlacademy.org"><meta name="twitter:title" property="og:title" content="Interactive online courses HTML Academy"><meta name="twitter:description" property="og:description" content="Together we’ll learn how to work with real code, solve true-to-life problems, use cutting edge technologies. 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Shall we play?</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-players">2. Players, let’s start!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/first-throw">3. My attempt number one</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/hello-object">4. Hello, object!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/read-object">5. Reading from the object</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-array">6. Count off!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/overwrite-property">7. Overriding object properties</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/pass-by-reference">8. Passing object by a link</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/game-rules-object">9. My game</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-attempts">10. Giving out the attempts</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/search-winner-start">11. Who is the winner?</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/loop-in-loop">12. Announce the entire list, please</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-if">13. Looking for a cat with great results</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/array-push-winners">14. No one will hide</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/else-if">15. New conditions</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/same-result">16. Hard to come across</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/print-winners">17. Let’s bring it all to light</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-new-player">18. Roll the dice, gentlemen cats!</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/edit-message">19. Let’s make adjustments</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/summary-1">20. Summary of “Objects”. Part 1</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/challenge-1">21. Tenth program: “Golden ball”</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/comp-config">22. Build it yourself!</a></li><li class="main-nav__course-contents-item main-nav__course-contents-item--current"><a href="/courses/javascript-programming/objects/first-method">23. My first method</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/methods-implementation">24. Implementing methods</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/map">25. Object as a dictionary</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/use-map">26. Bracket notation</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/this">27. Let’s not forget about the context</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/add-another-computer">28. Store check</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/summary-2">29. Summary of “Objects”. Part 2</a></li><li class="main-nav__course-contents-item"><a href="/courses/javascript-programming/objects/challenge-2">30. Eleventh program: “The house that Muffin built”</a></li></ul></div></div><a class="main-nav__course-item main-nav__course-button main-nav__course-button--next" href="/courses/javascript-programming/objects/methods-implementation">Implementing methods</a></div><ul class="main-nav__list main-nav__list--user main-nav__list--user-guest"><li class="main-nav__item" itemprop="name"><a class="main-nav__link" href="/signup?redirect_url=%2Fcourses%2Fjavascript-programming%2Fobjects%2Ffirst-method" title="Sign up" data-modal="open" data-value="register" itemprop="url"><span class="main-nav__icon" aria-hidden="true"><svg aria-hidden="true"><use xlink:href="/img/sprites/general.svg#user"></use></svg></span>Sign up</a></li><li class="main-nav__item main-nav__item--login" itemprop="name"><a class="main-nav__link" href="/login?redirect_url=%2Fcourses%2Fjavascript-programming%2Fobjects%2Ffirst-method" title="Log in" data-modal="open" data-value="login" itemprop="url"><span class="main-nav__icon" 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2.79-6.835-.084.354 2.613.43 4.138-1.208 1.078-1.125.446-2-.186-3.375-1.71-3.552-4.585-6.323-7.384-8.918-.716-.69-1.44-2.428-2.706-2-.995.353-.93 3.2-.716 4.073 1.09 7.448 4.065 18.263 4.065 18.263zm37.372-.78c-1.704-1.826-2.822-4.12-3.208-6.585 0 .354-2.614.354-4.056-1.29-.995-1.127-.362-1.86.363-3.117 1.86-3.198 4.863-5.718 7.746-8.136.81-.604 1.627-1.47 2.79-.93.994.428.715 2.334.548 3.115-1.083 5.72-2.48 11.376-4.183 16.943z" fill="#FFF"/><path d="M53.564 20.422c-1.98.51-4.138 1.636-5.105 3.487-.43-2.196 1.645-4.65 3.393-5.832.333-.21.312-.703-.037-.886-.162-.085-.357-.076-.512.022-2.157 1.562-4.417 4.5-3.784 7.188.076.262.354.41.614.325l-.075.28c-.085.603.93.864.994.26.446-2.158 2.706-3.376 4.77-3.897.372-.076.522-.526.27-.81-.133-.15-.342-.204-.53-.138zM17.457 18.06c-.55-.354-.995.428-.55.865 1.433 1.004 3.182 3.05 3.395 4.956-.93-1.86-3.05-2.975-5.105-3.486-.386-.005-.633.41-.445.747.042.076.103.14.176.184 2.073.52 4.324 1.73 4.77 3.896.106.328.5.46.78.26.273.192.653.06.745-.26.735-2.66-1.6-5.728-3.766-7.16z" fill="#F1662A"/></svg></span><p class="course-loading-overlay__message"><b class="course-loading-overlay__message-title">Loading…</b><br><span class="course-loading-overlay__message-text">Everything will be ready in few seconds</span></p></div></div><div class="course-layout__sidebar course-theory"><div class="course-theory__inner course-theory__inner--left-stub"><button class="course-theory__close icon-close icon-close--light" type="button">Close</button><ul class="course-tabs course-tabs--non-interactive course-layout__theory-heading js--theory-tabs"><li class="course-tabs__item course-tabs__item--external course-tab course-tab--centered"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered course-tab--active js--theory-tab__theory"><span class="course-tab__icon"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-theory"></use></svg></span><span class="course-tab__title">Theory</span></li><li class="course-tabs__item course-tabs__item--internal course-tab course-tab--centered js--theory-tab__comments"><span class="course-tab__icon"><svg aria-hidden="true" style="width: 16px; height: 16px; fill: #2e2c9c;"><use xlink:href="/img/sprites/up.svg#comment"></use></svg></span><span class="course-tab__title">Comments</span></li></ul><section class="course-theory__content"><div class="js--theory-pane__theory course-theory__content-inner"><h1 class="course-theory__content-heading">My first method</h1><div class="course-theory__content-text"><p>The function and the object were created. Let’s continue.</p><p>We need to calculate the computer’s price and log the final message. In order to do this, we need to create functions and write them directly into the object! We can do it!</p><p>Objects can store any types of data, including functions. Such function properties are called object <em>methods</em>. They are called in the same way as any other functions, using parentheses, and we access methods the same way as do object properties. As a result, the method call is written like this: <code>object.method()</code>.</p><p>The main thing in creating a method is to come up with a suitable name that describes what this method does. In the programming world, there are established naming traditions. For example, functions that return something are called getters and they begin with the word <code>get</code>. It looks like this:</p><pre><code>var cat = {
name: 'Muffin',
color: 'red',
age: 5,
getGreeting: function () {
return 'Meow, hello!';
}
};
console.log (cat.getGreeting ()); // Logs 'Meow, hello!'</code></pre><p>Since methods are functions, why do we even write them into an object and not use the usual external functions?</p><p>Methods are used to work with objects. They read properties, rewrite and return them. Yes, you can create an external function, transfer an object to it and process it inside this function. But it’s much more convenient to keep in the object everything that relates to this object. For example, we store specifications inside computer object, and we need to return a line with data and calculate the price. These two tasks are related specifically to the computer object, and we’ll write these functions into the object.</p><p>Create a simple getter for the computer object and check to see if everything works as it should.</p></div></div><div class="js--theory-pane__comments hidden course-theory__content-inner"><div class="course-theory__content-text"><h2 class="course-theory__content-heading">Comments</h2><div id="disqus_thread"></div><script>
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</script><noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript></div></div></section><div class="course-theory__controls"><button class="button button--close" type="button">To the task</button></div></div></div><div class="course-layout__column course-layout__column--left"><ul class="js--course-tabs course-tabs course-layout__course-tabs"><li class="course-tabs__item course-tab js--editor-tab course-tabs__item--limited course-tabs__item--limited-large course-tab--active" data-editor="js"><span class="course-tab__title course-tab__title--indent"><span class="course-tab__title-part course-tab__title-part--active">script.js</span></span></li></ul><div class="course-layout__editors"><div class="js--editor course-editor course-layout__editor" id="" data-tab="js" data-split=""><span class="course-editor__label"><span class="course-editor__label-item">JavaScript</span></span><div class="course-editor__item" id="js-editor">var buildComputer = function (memory, display, processor) {
var computer = {
basicPrice: 5000,
processor: processor,
display: display,
memory: memory
};
return computer;
};
var myComputer = buildComputer(8, 13, 'i7');
console.log(myComputer);
</div></div></div><div class="course-editor-controls"><button class="course-editor-controls__item course-editor-controls__item--answer" type="button">Show the answer</button></div><div class="js--feedback course-unhappy"><button class="js--feedback-btn course-unhappy__button" type="button"><span class="sr-only">Complain</span><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#unhappy"></use></svg></button><div class="js--feedback-modal course-unhappy__modal course-unhappy__modal--step-one"><form method="POST" action="/courses/javascript-programming/objects/first-method/signal" class="course-unhappy__form form"><input type="hidden" name="csrf_name" value="csrf69aec33d51c4b"><input type="hidden" name="csrf_value" value="13ac7217300a294353696498a63050ce"><p class="course-unhappy__text">What didn’t you like in this task?</p><div class="course-unhappy__slide"><div class="course-unhappy__wrap"><div class="course-unhappy__list"><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="1" type="checkbox"><span class="checkbox__text">The code check doesn’t work</span></label><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="2" type="checkbox"><span class="checkbox__text">The task is too difficult</span></label><label class="checkbox checkbox--small"><input class="checkbox__input" name="problems" value="3" type="checkbox"><span class="checkbox__text">The theory is hard to understand</span></label><label class="checkbox checkbox--small"><input class="js--feedback-other-checkbox checkbox__input" name="problems" value="0" type="checkbox"><span class="checkbox__text">Other (will write below)</span></label></div><div class="course-unhappy__message"><label class="sr-only" for="id-message">Другое (сейчас напишу)</label><textarea class="field field--area" id="id-message" name="message" placeholder="For example, a typo in the word «heading»"></textarea></div></div></div><button class="course-unhappy__control course-unhappy__control--prev" type="button"><span class="sr-only">Prev</span><svg aria-hidden="true"><use xlink:href="/img/sprites/landings.svg#arrow"></use></svg></button><button class="course-unhappy__control course-unhappy__control--next" type="button" disabled><span class="sr-only">Next</span><svg aria-hidden="true"><use xlink:href="/img/sprites/landings.svg#arrow"></use></svg></button><button class="js--submit-btn button" disabled>Submit</button></form><p class="course-unhappy__result hidden">Thanks! We’ll fix everything at once!</p></div></div></div><div class="course-layout__column course-layout__column--right"><span class="course-separator-control"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-arrows-separator"></use></svg></span><div class="course-browser"><div class="course-browser__menu"><span class="course-browser__menu-item course-browser__address"><span class="course-browser__menu-item-inner">Console</span></span><button class="js--autorun course-browser__menu-item course-browser__menu-button course-browser__menu-button--text-with-icon course-browser__menu-button--autorun course-browser__menu-button--autorun-on" title="Autorun" type="button"><span class="course-browser__menu-item-inner"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-autorun"></use></svg>
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Run</button></div><div class="course-browser__content"><div class="console js--console"><h2 class="sr-only">Result</h2><div class="console__content js--console__content"></div></div></div><div class="course-goals js--goals"><div class="course-goals__heading"><span class="course-goals__heading-title"><span class="course-goals__count-label">Goals</span><span class="course-goals__count">completed</span></span><button class="course-goals__button course-goals__button--expand js--goals__expand" type="button"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#icon-collapse"></use></svg></button><a class="course-goals__button course-goals__button--next button button--green button--without-border hidden" href="/courses/javascript-programming/objects/methods-implementation" title="Implementing methods"><svg aria-hidden="true"><use xlink:href="/img/sprites/courses.svg#arrow-white--mini"></use></svg></a></div><div class="course-goals__content"><ol class="course-goals__list"><li class="course-goals__list-item">Add the <code>getDescription</code> method, which returns the <code>'computer'</code> line, to the <code>computer</code> object.</li><li class="course-goals__list-item">Instead of logging variable <code>myComputer</code> in the console, log message <code>'In the cart ' + myComputer.getDescription()</code>.</li></ol></div></div></div></div></article></div><div class="course-interface__overlay course-interface__overlay--active"></div></main><script
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