b36cdbafd1
* chore: rename part to step * chore: update metas * chore: more renaming * chore: update tooling * chore: update frontmatter * chore(tools): title testing
1.5 KiB
1.5 KiB
id, title, challengeType, dashedName
| id | title | challengeType | dashedName |
|---|---|---|---|
| 5d792533ed00e75d129e1b18 | Step 13 | 0 | step-13 |
--description--
replace is a higher order function because it can take a function as argument (higher order functions can also return functions).
Pass the + function from infixToFunction to the replace method as the second argument.
This is how you would pass the - function:
str.replace(regex, infixToFunction["-"])
--hints--
See description above for instructions.
assert(infixEval('ab', /(a)b/) === 'aba');
--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, "");
</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, infixToFunction["+"]);
</script>