ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
119 lines
2.0 KiB
Markdown
119 lines
2.0 KiB
Markdown
---
|
|
id: 5d7925346f4f2da6df4354a6
|
|
title: Part 25
|
|
challengeType: 0
|
|
dashedName: part-25
|
|
---
|
|
|
|
# --description--
|
|
|
|
Define an empty function `applyFn` which takes an argument `str`. Use the curly brace syntax with an anonymous function. Do not wrap parentheses around the parameter.
|
|
|
|
# --hints--
|
|
|
|
See description above for instructions.
|
|
|
|
```js
|
|
assert(code.replace(/\s/g, '').includes('constapplyFn=str=>{}'));
|
|
```
|
|
|
|
# --seed--
|
|
|
|
## --before-user-code--
|
|
|
|
```html
|
|
<!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--
|
|
|
|
```html
|
|
</body>
|
|
</html>
|
|
```
|
|
|
|
## --seed-contents--
|
|
|
|
```html
|
|
<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
|
|
};
|
|
|
|
|
|
</script>
|
|
```
|
|
|
|
# --solutions--
|
|
|
|
```html
|
|
<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 => {
|
|
|
|
}
|
|
</script>
|
|
```
|