freeCodeCamp/part-014.md at e2ae6303d587297199059dc0564b7fe12e7987fb

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

1.8 KiB

Raw Blame History

id, title, challengeType

id	title	challengeType
5d792533a5c42fb4d1a4b70d	Part 14	0

Description

Replace the second argument of str.replace with an anonymous function, which takes match, arg1, fn, and arg2, and returns infixToFunction["+"].

Instructions

Tests

tests:
  - text: See description above for instructions.
    testString: assert(code.replace(/\s/g, "").includes('str.replace(regex,(match,arg1,fn,arg2)=>infixToFunction["+"])'));

Challenge Seed

<script>

const infixToFunction = {
  "+": (x, y) => x + y,
  "-": (x, y) => x - y,
  "*": (x, y) => x * y,
  "/": (x, y) => x / y
};

const infixEval = (str, regex) => str.replace(regex, infixToFunction["+"]);


</script>

Before Test

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Spreadsheet</title>
  <style>
    #container {
      display: grid;
      grid-template-columns: 50px repeat(10, 200px);
      grid-template-rows: repeat(11, 30px);
    }
    .label {
      background-color: lightgray;
      text-align: center;
      vertical-align: middle;
      line-height: 30px;
    }
  </style>
</head>
<body>
<div id="container">
  <div></div>
</div>

After Test

</body>
</html>

Solution

<script>
const infixToFunction = {
  "+": (x, y) => x + y,
  "-": (x, y) => x - y,
  "*": (x, y) => x * y,
  "/": (x, y) => x / y
};

const infixEval = (str, regex) =>
  str.replace(regex, (match, arg1, fn, arg2) =>
    infixToFunction["+"]
  );
</script>

1.8 KiB Raw Blame History