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Naomi Carrigan fe71a9cf25 feat: new js cert (#45873 )

* chore: move files

* wip: i have no idea what i am doing

* feat: finish up the logic

* chore: use order from randy sheet

* chore: standardise titles

* feat: fix layout for new js projects

* fix: utils test

* fix: challenge tests

* fix: ignore show new curriculum on non-english tests

* chore: help category????

* fix: if these tests would fail locally that'd be great

* chore: duplicate ids

2022-05-16 11:53:45 +02:00

3.2 KiB

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id, title, challengeType, dashedName

id	title	challengeType	dashedName
5d792534408c5be896b0a46e	Step 37	0	step-37

--description--

The hasOwnProperty method checks if a key exists in an object. So spreadsheetFunctions.hasOwnProperty("") would return true, but replacing "" with anything else would make it return false.

Chain hasOwnProperty to spreadsheetFunctions to check if the fn.toLowerCase() key exists in spreadsheetFunctions.

--hints--

See description above for instructions.

assert(
  code
    .replace(/\s/g, '')
    .includes(
      'returnstr2.replace(regex,(match,fn,args)=>spreadsheetFunctions.hasOwnProperty(fn.toLowerCase()))'
    )
);

--seed--

--before-user-code--

<!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-user-code--

</body>
</html>

--seed-contents--

<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, (_, arg1, fn, arg2) =>
    infixToFunction[fn](parseFloat(arg1), parseFloat(arg2))
  );

const highPrecedence = str => {
  const regex = /([0-9.]+)([*\/])([0-9.]+)/;
  const str2 = infixEval(str, regex);
  return str === str2 ? str : highPrecedence(str2);
};

const spreadsheetFunctions = {
  "": x => x
};

const applyFn = str => {
  const noHigh = highPrecedence(str);
  const infix = /([0-9.]+)([+-])([0-9.]+)/;
  const str2 = infixEval(noHigh, infix);
  const regex = /([a-z]*)\(([0-9., ]*)\)(?!.*\()/i;
  const toNumberList = args => args.split(",").map(parseFloat);
  const applyFunction = (fn, args) =>
    spreadsheetFunctions[fn.toLowerCase()](toNumberList(args));
  return str2.replace(regex, (match, fn, args) => spreadsheetFunctions);
}


</script>

--solutions--

<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, (_, arg1, fn, arg2) =>
    infixToFunction[fn](parseFloat(arg1), parseFloat(arg2))
  );

const highPrecedence = str => {
  const regex = /([0-9.]+)([*\/])([0-9.]+)/;
  const str2 = infixEval(str, regex);
  return str === str2 ? str : highPrecedence(str2);
};

const spreadsheetFunctions = {
  "": x => x
};

const applyFn = str => {
  const noHigh = highPrecedence(str);
  const infix = /([0-9.]+)([+-])([0-9.]+)/;
  const str2 = infixEval(noHigh, infix);
  const regex = /([a-z]*)\(([0-9., ]*)\)(?!.*\()/i;
  const toNumberList = args => args.split(",").map(parseFloat);
  const applyFunction = (fn, args) =>
    spreadsheetFunctions[fn.toLowerCase()](toNumberList(args));
  return str2.replace(
    regex,
    (match, fn, args) =>
      spreadsheetFunctions.hasOwnProperty(fn.toLowerCase())
  );
}
</script>

3.2 KiB Raw Blame History