86 lines
1.7 KiB
Markdown
86 lines
1.7 KiB
Markdown
---
|
|
id: 56533eb9ac21ba0edf2244c0
|
|
title: Global vs. Local Scope in Functions
|
|
challengeType: 1
|
|
videoUrl: 'https://scrimba.com/c/c2QwKH2'
|
|
forumTopicId: 18194
|
|
---
|
|
|
|
## Description
|
|
<section id='description'>
|
|
It is possible to have both <dfn>local</dfn> and <dfn>global</dfn> variables with the same name. When you do this, the <code>local</code> variable takes precedence over the <code>global</code> variable.
|
|
In this example:
|
|
|
|
```js
|
|
var someVar = "Hat";
|
|
function myFun() {
|
|
var someVar = "Head";
|
|
return someVar;
|
|
}
|
|
```
|
|
|
|
The function <code>myFun</code> will return <code>"Head"</code> because the <code>local</code> version of the variable is present.
|
|
</section>
|
|
|
|
## Instructions
|
|
<section id='instructions'>
|
|
Add a local variable to <code>myOutfit</code> function to override the value of <code>outerWear</code> with <code>"sweater"</code>.
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: You should not change the value of the global <code>outerWear</code>.
|
|
testString: assert(outerWear === "T-Shirt");
|
|
- text: <code>myOutfit</code> should return <code>"sweater"</code>.
|
|
testString: assert(myOutfit() === "sweater");
|
|
- text: You should not change the return statement.
|
|
testString: assert(/return outerWear/.test(code));
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='js-seed'>
|
|
|
|
```js
|
|
// Setup
|
|
var outerWear = "T-Shirt";
|
|
|
|
function myOutfit() {
|
|
// Only change code below this line
|
|
|
|
|
|
|
|
// Only change code above this line
|
|
return outerWear;
|
|
}
|
|
|
|
myOutfit();
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
|
|
```js
|
|
var outerWear = "T-Shirt";
|
|
function myOutfit() {
|
|
var outerWear = "sweater";
|
|
return outerWear;
|
|
}
|
|
```
|
|
|
|
</section>
|