freeCodeCamp/part-013.md at df44da9dc20488fc5c908bd770087e8380216dd5

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
5ddb965c65d27e1512d44da6	Part 13	0

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:

function(meal){}

Enter in the above function as an argument in between the parentheses of the .map() function.

Instructions

Tests

tests:
  - text: See description above for instructions.
    testString: assert( code.replace(/\s/g, '').match(/map\(function\(\s*meal\)\{\}\)/) );

Challenge Seed

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

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

3.1 KiB Raw Blame History