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3c1353fbe0
Co-authored-by: Naomi <nhcarrigan@gmail.com> Co-authored-by: Sem Bauke <semboot699@gmail.com>
4.9 KiB
4.9 KiB
id, title, challengeType, dashedName
| id | title | challengeType | dashedName |
|---|---|---|---|
| 6352ec8b9c70fd17b8c7ba3f | Step 38 | 0 | step-38 |
--description--
Now you need to sort the values properly. Chain the .sort() method to your Object.keys() call.
For the callback, you'll need to use the counts object to compare the values of each key. You can use the a and b parameters to access the keys. Then, return the value of counts[b] minus the value of counts[a].
Finally, access the first element in the array using bracket notation to complete your highest variable.
--hints--
Your getMode function should use the sort method to sort the Object.keys() array.
assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(/)
Your getMode function should pass a callback to the sort method with parameters a and b.
assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)/)
Your getMode function should use the sort method to sort the Object.keys() array and return the value of counts[b] minus the value of counts[a].
assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)/)
Your highest variable should have the value of the first entry in the sorted Object.keys(counts) array.
assert.match(getMode.toString(), /highest\s*=\s*Object\.keys\(\s*counts\s*\)\.sort\(\s*function\s*\(\s*a\s*,\s*b\s*\)\s*\{\s*return\s+counts\s*\[\s*b\s*\]\s*-\s*counts\s*\[\s*a\s*\]\s*;?\s*\}\s*\)\s*\[\s*0\s*\]\s*;/)
--seed--
--seed-contents--
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<link rel="stylesheet" href="./styles.css" />
<script src="./script.js"></script>
<title>Statistics Calculator</title>
</head>
<body>
<h1>Statistics Calculator</h1>
<p>Enter a list of comma-separated numbers.</p>
<form onsubmit="calculate(); return false;">
<label for="numbers">Numbers:</label>
<input type="text" name="numbers" id="numbers" />
<button type="submit">Calculate</button>
</form>
<div class="results">
<p>
The <dfn>mean</dfn> of a list of numbers is the average, calculated by
taking the sum of all numbers and dividing that by the count of numbers.
</p>
<p class="bold">Mean: <span id="mean"></span></p>
<p>
The <dfn>median</dfn> of a list of numbers is the number that appears in
the middle of the list, when sorted from least to greatest.
</p>
<p class="bold">Median: <span id="median"></span></p>
<p>
The <dfn>mode</dfn> of a list of numbers is the number that appears most
often in the list.
</p>
<p class="bold">Mode: <span id="mode"></span></p>
<p>
The <dfn>range</dfn> of a list of numbers is the difference between the
largest and smallest numbers in the list.
</p>
<p class="bold">Range: <span id="range"></span></p>
<p>
The <dfn>variance</dfn> of a list of numbers measures how far the values
are from the mean, on average.
</p>
<p class="bold">Variance: <span id="variance"></span></p>
<p>
The <dfn>standard deviation</dfn> of a list of numbers is the square
root of the variance.
</p>
<p class="bold">
Standard Deviation: <span id="standardDeviation"></span>
</p>
</div>
</body>
</html>
body {
margin: 0;
background-color: rgb(27, 27, 50);
text-align: center;
color: #fff;
}
button {
cursor: pointer;
background-color: rgb(59, 59, 79);
border: 3px solid white;
color: white;
}
input {
background-color: rgb(10, 10, 35);
color: white;
border: 1px solid rgb(59, 59, 79);
}
.bold {
font-weight: bold;
}
const getMean = (array) => array.reduce((acc, el) => acc + el, 0) / array.length;
const getMedian = (array) => {
const sorted = array.sort((a, b) => a - b);
const median =
array.length % 2 === 0
? getMean([sorted[array.length / 2], sorted[array.length / 2 - 1]])
: sorted[Math.floor(array.length / 2)];
return median;
}
--fcc-editable-region--
const getMode = (array) => {
const counts = {};
array.forEach((el) => {
counts[el] = (counts[el] || 0) + 1;
})
if (new Set(Object.values(counts)).size === 1) {
return null;
}
const highest = Object.keys(counts);
}
--fcc-editable-region--
const calculate = () => {
const value = document.querySelector("#numbers").value;
const array = value.split(/,\s*/g);
const numbers = array.map(el => Number(el)).filter(el => !isNaN(el));
const mean = getMean(numbers);
const median = getMedian(numbers);
document.querySelector("#mean").textContent = mean;
document.querySelector("#median").textContent = median;
}