Воващ

const newObj = Object.fromEntries(Object
  .entries(obj)
  .sort((a, b) => a[1] - b[1])
  .slice(-propsCount)
);

Object
  .entries(obj)
  .sort((a, b) => b[1] - a[1])
  .slice(propsCount)
  .forEach(n => delete obj[n[0]]);

const newUrl = url.match(/.+\//)[0];

// или

const newUrl = url.replace(/[^\/]+$/, '');

// или

const newUrl = url.slice(0, url.lastIndexOf('/') + 1);

// или

const newUrl = url.split(/(\/)/).slice(0, -1).join('');

preg_match('/.+\//', $url, $match);
$newUrl = $match[0];

// или

$newUrl = preg_replace('/[^\/]+$/', '', $url);

// или

$newUrl = substr($url, 0, strrpos($url, '/') + 1);

// или

$newUrl = implode('', array_slice(preg_split('/(\/)/', $url, 0, PREG_SPLIT_DELIM_CAPTURE), 0, -1));

const sum = arr.reduceRight((acc, n) => n && acc + n, 0);

let sum = 0;
for (let i = 0; arr[i]; sum += arr[i++]) ;

let sum = 0;
for (const n of arr) {
  if (!n) {
    break;
  }
  sum += n;
}

const sum = (function sum(i, n = arr[i]) {
  return n ? n + sum(i + 1) : 0;
})(0);

const xxx = ([...str]) => [...new Set(Array.from(
  { length: str.length * 10 },
  (n, i) => str.map((m, j) => (j === (i / 10 | 0)) ? i % 10 : m).join('')
))];

function xxx(str) {
  const arr = str.split('');
  const result = [ str ];

  for (const [ i, n ] of arr.entries()) {
    for (let j = 0; j < 10; j++) {
      if (j !== +n) {
        arr[i] = j;
        result.push(arr.join(''));
      }
    }

    arr[i] = n;
  }

  return result;
}

hrefs.filter(n => !/\.pdf$/.test(n))
// или
hrefs.filter(n => !n.endsWith('.pdf'))
// или
hrefs.filter(n => n.split('.').pop() !== 'pdf')
// или
hrefs.filter(n => n.lastIndexOf('.pdf') !== n.length - 4)
// или
hrefs.filter(n => n.slice(-4) !== '.pdf')
// или
hrefs.filter(n => n.replace(/.*\./, '') !== 'pdf')
// или
hrefs.filter(n => n.match(/\.[^.]+$/g) != '.pdf')

hrefs.filter(function(val) { return val.indexOf(".pdf") === -1 });

function format(str) {
    const s = str.length;
    const chars = str.split('');
    const strWithSpaces = chars.reduceRight((acc, char, i) => {
        const spaceOrNothing = ((((s - i) % 3) === 0) ? ' ' : '');
        return (spaceOrNothing + char + acc);
    }, '');

    return ((strWithSpaces[0] === ' ') ? strWithSpaces.slice(1) : strWithSpaces);
}

loginEl.value = emailEl.value.replace(/(@.*)/, '');

const table = useTable({
          columns,
          data,
          initialState: { pageIndex: 0 },
        },
        useSortBy,
        usePagination
);