freeCodeCamp/part-012.md at fb0812b6d2ea8b32d2d7ba7754fa2c41421b858a

chore(learn): Remove remaining isHidden keys from frontmatter (English and Chinese challenges) (#39809 )

* fix: remove isHidden key from tool template

* fix: removed isHidden key from English challenges

* fix: remove isHidden key from Chinese challenges

2020-10-08 14:18:47 +02:00

3.1 KiB

Raw Blame History

id, title, challengeType

id	title	challengeType
5ddb965c65d27e1512d44da5	Part 12	0

Description

We need a way to iterate through all the meal items in the total array and return the values that the user entered as an array.

The map() method allows us to do exactly that.

Delete const meal = total[0]; and chain the .map() method to the end of your Array.from() method. Here's an example of .map() chained to an array: [3, 2, 1].map()

Instructions

Tests

tests:
  - text: See description above for instructions.
    testString: assert( code.toString().replace(/\s/g, '').match(/Array\.from\(document\.getElementsByClassName\([\'\"\`]cal\-control[\'\"\`]\)\)\.map\(\)\;?/) );

Challenge Seed

<script>
  document.getElementById('calorie-form').onsubmit = calculate;

  function calculate(e) {
    e.preventDefault();
    const total = Array.from(document.getElementsByClassName('cal-control'));
    const meal = total[0];
  }
</script>

Before Test

<!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>

After Test

  </body>
</html>

Solution

<script>
  document.getElementById('calorie-form').onsubmit = calculate;

  function calculate(e) {
    e.preventDefault();
    const total = Array.from(
      document.getElementsByClassName('cal-control')
    ).map();
  }
</script>

3.1 KiB Raw Blame History