2.0 KiB
2.0 KiB
title | id | challengeType |
---|---|---|
Averages-Mode | 594d8d0ab97724821379b1e6 | 5 |
Description
Instructions
Tests
tests:
- text: <code>mode</code> is a function.
testString: assert(typeof mode === 'function', '<code>mode</code> is a function.');
- text: <code>mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])</code> should equal <code>[6]</code>
testString: assert.deepEqual(mode(arr1), [6], '<code>mode([1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17])</code> should equal <code>[6]</code>');
- text: <code>mode([1, 2, 4, 4, 1])</code> should equal <code>[1, 4]</code>.
testString: assert.deepEqual(mode(arr2).sort(), [1, 4], '<code>mode([1, 2, 4, 4, 1])</code> should equal <code>[1, 4]</code>.');
Challenge Seed
function mode(arr) {
// Good luck!
return true;
}
After Test
const arr1 = [1, 3, 6, 6, 6, 6, 7, 7, 12, 12, 17];
const arr2 = [1, 2, 4, 4, 1];
Solution
function mode(arr) {
const counter = {};
let result = [];
let max = 0;
// for (const i in arr) {
arr.forEach(el => {
if (!(el in counter)) {
counter[el] = 0;
}
counter[el]++;
if (counter[el] === max) {
result.push(el);
}
else if (counter[el] > max) {
max = counter[el];
result = [el];
}
});
return result;
}