85 lines
2.3 KiB
Markdown
85 lines
2.3 KiB
Markdown
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---
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id: 567af2437cbaa8c51670a16c
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title: Testing Objects for Properties
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localeTitle: Prueba de objetos para propiedades
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challengeType: 1
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---
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## Description
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<section id='description'>
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A veces es útil verificar si la propiedad de un objeto dado existe o no. Podemos usar el método de objetos <code>.hasOwnProperty(propname)</code> para determinar si ese objeto tiene el nombre de propiedad dado. <code>.hasOwnProperty()</code> devuelve <code>true</code> o <code>false</code> si se encuentra la propiedad o no.
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<strong>Ejemplo</strong>
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<blockquote>var myObj = {<br> top: "hat",<br> bottom: "pants"<br>};<br>myObj.hasOwnProperty("top"); // true<br>myObj.hasOwnProperty("middle"); // false</blockquote>
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</section>
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## Instructions
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<section id='instructions'>
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Modifique la función <code>checkObj</code> para probar <code>myObj</code> para <code>checkProp</code> . Si se encuentra la propiedad, devuelva el valor de esa propiedad. Si no, devuelve <code>"Not Found"</code> .
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</section>
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## Tests
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<section id='tests'>
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```yml
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tests:
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- text: <code>checkObj("gift")</code> debe devolver <code>"pony"</code> .
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testString: 'assert(checkObj("gift") === "pony", "<code>checkObj("gift")</code> should return <code>"pony"</code>.");'
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- text: <code>checkObj("pet")</code> debe devolver <code>"kitten"</code> .
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testString: 'assert(checkObj("pet") === "kitten", "<code>checkObj("pet")</code> should return <code>"kitten"</code>.");'
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- text: <code>checkObj("house")</code> debe devolver <code>"Not Found"</code> .
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testString: 'assert(checkObj("house") === "Not Found", "<code>checkObj("house")</code> should return <code>"Not Found"</code>.");'
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```
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</section>
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## Challenge Seed
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<section id='challengeSeed'>
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<div id='js-seed'>
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```js
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// Setup
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var myObj = {
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gift: "pony",
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pet: "kitten",
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bed: "sleigh"
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};
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function checkObj(checkProp) {
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// Your Code Here
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return "Change Me!";
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}
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// Test your code by modifying these values
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checkObj("gift");
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```
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</div>
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</section>
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## Solution
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<section id='solution'>
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```js
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var myObj = {
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gift: "pony",
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pet: "kitten",
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bed: "sleigh"
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};
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function checkObj(checkProp) {
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if(myObj.hasOwnProperty(checkProp)) {
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return myObj[checkProp];
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} else {
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return "Not Found";
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}
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}
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```
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</section>
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