57 lines
1.1 KiB
Markdown
57 lines
1.1 KiB
Markdown
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---
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id: 587d8250367417b2b2512c5e
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title: Learn how a Stack Works
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challengeType: 1
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videoUrl: ''
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localeTitle: ''
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---
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## Description
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undefined
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## Instructions
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undefined
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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: ''
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testString: 'assert(homeworkStack.length === 4, "<code>homeworkStack</code> should only contain 4 elements.");'
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- text: ''
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testString: 'assert(homeworkStack[3] === "CS50", "The last element in <code>homeworkStack</code> should be <code>"CS50"</code>.");'
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- text: ''
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testString: 'assert(homeworkStack.indexOf("PSY44") === -1, "<code>homeworkStack</code> should not contain <code>"PSY44"</code>.");'
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- text: ''
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testString: 'assert(code.match(/=/g).length === 1 && /homeworkStack\s*=\s*\["BIO12"\s*,\s*"HIS80"\s*,\s*"MAT122"\s*,\s*"PSY44"\]/.test(code), "The initial declaration of the <code>homeworkStack</code> should not be changed.");'
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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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var homeworkStack = ["BIO12","HIS80","MAT122","PSY44"];
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// Only change code below this line
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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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// solution required
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```
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</section>
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