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Nov 19, 2022CodeCatch
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Get timezone as a string

Nov 19, 2022CodeCatch

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const getTimezone = () => Intl.DateTimeFormat().resolvedOptions().timeZone;
// Example
getTimezone();

find primes

Nov 19, 2022CodeCatch

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const primes = num => {
let arr = Array.from({ length: num - 1 }).map((x, i) => i + 2),
sqroot = Math.floor(Math.sqrt(num)),
numsTillSqroot = Array.from({ length: sqroot - 1 }).map((x, i) => i + 2);
numsTillSqroot.forEach(x => (arr = arr.filter(y => y % x !== 0 || y === x)));
return arr;
};
primes(10); // [2, 3, 5, 7]

deep merge objects

Nov 19, 2022CodeCatch

0 likes • 3 views

const deepMerge = (a, b, fn) =>
[...new Set([...Object.keys(a), ...Object.keys(b)])].reduce(
(acc, key) => ({ ...acc, [key]: fn(key, a[key], b[key]) }),
{}
);
deepMerge(
{ a: true, b: { c: [1, 2, 3] } },
{ a: false, b: { d: [1, 2, 3] } },
(key, a, b) => (key === 'a' ? a && b : Object.assign({}, a, b))
);
// { a: false, b: { c: [ 1, 2, 3 ], d: [ 1, 2, 3 ] } }

Responsive Bootstrap Card.Img

Jan 25, 2023C S

0 likes • 20 views

const ResponsiveCardImg = styled(Card.Img)`
// For screens wider than 768px
@media(min-width: 768px) {
// Your responsive styles here.
}
// For screens smaller than 768px
@media(max-width: 768px) {
// Your responsive styles here.
}
`
export default function App() {
return (
<MainContainer>
<Container>
<Card text='white' bg='dark' style={styles.mainCard}>
<ResponsiveCardImg
style={styles.cardImage}
onClick={handleClick}
src={apeImage}
alt='Degenerate Ape Academy'
/>
<Card.Body>
<Card.Title className='text-center' as='h2'>
{apeId}
</Card.Title>
</Card.Body>
</Card>
</Container>
</MainContainer>
);
}

Clone an array

Nov 19, 2022CodeCatch

0 likes • 1 view

// `arr` is an array
const clone = arr => arr.slice(0);
// Or
const clone = arr => [...arr];
// Or
const clone = arr => Array.from(arr);
// Or
const clone = arr => arr.map(x => x);
// Or
const clone = arr => JSON.parse(JSON.stringify(arr));
// Or
const clone = arr => arr.concat([]);

bucket sort

Nov 19, 2022CodeCatch

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const bucketSort = (arr, size = 5) => {
const min = Math.min(...arr);
const max = Math.max(...arr);
const buckets = Array.from(
{ length: Math.floor((max - min) / size) + 1 },
() => []
);
arr.forEach(val => {
buckets[Math.floor((val - min) / size)].push(val);
});
return buckets.reduce((acc, b) => [...acc, ...b.sort((a, b) => a - b)], []);
};
bucketSort([6, 3, 4, 1]); // [1, 3, 4, 6]