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>
175 lines
3.7 KiB
Markdown
175 lines
3.7 KiB
Markdown
---
|
|
id: 5d79253555aa652afbb68086
|
|
title: Part 54
|
|
challengeType: 0
|
|
dashedName: part-54
|
|
---
|
|
|
|
# --description--
|
|
|
|
Define a function `rangeFromString` in `evalFormula` which takes `n1` and `n2` as arguments and returns `n1`.
|
|
|
|
# --hints--
|
|
|
|
See description above for instructions.
|
|
|
|
```js
|
|
assert(
|
|
/evalFormula.*constrangeFromString=\(n1,n2\)=>n1/.test(
|
|
code.replace(/\s/g, '')
|
|
)
|
|
);
|
|
```
|
|
|
|
# --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
|
|
};
|
|
|
|
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()) ? applyFunction(fn, args) : match
|
|
);
|
|
};
|
|
|
|
const range = (start, end) =>
|
|
start > end ? [] : [start].concat(range(start + 1, end));
|
|
|
|
const charRange = (start, end) =>
|
|
range(start.charCodeAt(0), end.charCodeAt(0)).map(x =>
|
|
String.fromCharCode(x)
|
|
);
|
|
|
|
const evalFormula = x => {
|
|
const rangeRegex = /([A-J])([1-9][0-9]?):([A-J])([1-9][0-9]?)/gi;
|
|
|
|
};
|
|
|
|
|
|
</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 => {
|
|
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()) ? applyFunction(fn, args) : match
|
|
);
|
|
};
|
|
|
|
const range = (start, end) =>
|
|
start > end ? [] : [start].concat(range(start + 1, end));
|
|
|
|
const charRange = (start, end) =>
|
|
range(start.charCodeAt(0), end.charCodeAt(0)).map(x =>
|
|
String.fromCharCode(x)
|
|
);
|
|
|
|
const evalFormula = x => {
|
|
const rangeRegex = /([A-J])([1-9][0-9]?):([A-J])([1-9][0-9]?)/gi;
|
|
const rangeFromString = (n1, n2) => n1;
|
|
};
|
|
</script>
|
|
```
|