2019-12-07 17:11:14 -07:00
---
id: 5ddb965c65d27e1512d44da6
title: Part 13
challengeType: 0
2020-06-24 16:22:14 +09:00
isHidden: true
2019-12-07 17:11:14 -07:00
---
## Description
< section id = 'description' >
Now we need to provide a function to `map()` that will be performed on each item of the array.
This function will take the original item as an argument, in our case we'll call it `meal` . Inside the `.map()` parentheses, insert an empty function that takes `meal` as a parameter, like:
```js
function(meal){}
```
Enter in the above function as an argument in between the parentheses of the `.map()` function.
< / section >
## Instructions
< section id = 'instructions' >
< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: See description above for instructions.
testString: assert( code.replace(/\s/g, '').match(/map\(function\(\s*meal\)\{\}\)/) );
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'html-seed' >
```html
< script >
document.getElementById('calorie-form').onsubmit = calculate;
function calculate(e) {
e.preventDefault();
const total = Array.from(
document.getElementsByClassName('cal-control')
).map();
}
< / script >
```
< / div >
### Before Test
< div id = 'html-setup' >
```html
<!DOCTYPE html>
< html >
< head >
< meta charset = "utf-8" / >
< title > < / title >
< meta name = "description" content = "" / >
< meta name = "viewport" content = "width=device-width, initial-scale=1" / >
< link rel = "stylesheet" href = "styles.css" / >
< / head >
< body >
< div class = "container" >
< form id = "calorie-form" >
< h2 class = "center" > Calorie Counter< / h2 >
< div class = "grid" >
< legend > Sex< / legend >
< div >
< input type = "radio" name = "sex" id = "female" value = "F" checked / >
< label for = "female" >
Female (2,000 calories)
< / label >
< div >
< input type = "radio" name = "sex" id = "male" value = "M" / >
< label for = "male" >
Male (2,500 calories)
< / label >
< / div >
< / div >
< / div >
< div class = "grid" id = "entries" >
Breakfast
< input
type="number"
min="0"
class="cal-control"
id="breakfast"
/>< br / >
Lunch
< input type = "number" min = "0" class = "cal-control" id = "lunch" / > < br / >
Dinner < input type = "number" min = "0" class = "cal-control" id = "dinner" / >
< / div >
< button type = "button" class = "btn-add" id = "add" >
Add Entry
< / button >
< button type = "submit" class = "btn-solid" id = "calculate" >
Calculate
< / button >
< button type = "button" class = "btn-outline" id = "clear" >
Clear
< / button >
< / form >
< div id = "output" > < / div >
< / div >
< / body >
< / html >
```
< / div >
### After Test
< div id = 'html-teardown' >
```html
< / body >
< / html >
```
< / div >
< / section >
## Solution
< section id = 'solution' >
```html
< script >
document.getElementById('calorie-form').onsubmit = calculate;
function calculate(e) {
e.preventDefault();
const total = Array.from(
document.getElementsByClassName('cal-control')
).map(function(meal) {});
}
< / script >
```
< / section >
