Rsa97

$this->clients = [
    'session_id_1' => [$conn1, $conn2, ...],
    'session_id_2' => [$conn5, $conn7, ...],
    ...
};

const StringChallenge = (str) =>
  str.replaceAll(/(?<=[13579])(?=[13579])/g, '-')
     .replaceAll(/(?<=[2468])(?=[2468])/g, '*');

const StringChallenge = (str) => 
  str.split('').reduce(
    (acc, dig) => {
      const sign = +dig ? (dig % 2 ? '-' : '*') : '';
      return {
        str: acc.str + (acc.sign === sign ? sign : '') + dig,
        sign,
      };
    },
    { str: '', sign: '' },
  ).str;

foreach ($this->tests as $test) {
  Test::clearLines($test);
}

const combinations = (arr, num) => {
  const result = [];
  const comb = (arr, n, idx, cur) => {
    for (let i = idx; i <= arr.length - n; i += 1) {
      cur.push(arr[i]);
      if (n === 1) {
        result.push([...cur]);
      } else {
        comb(arr, n - 1, i + 1, cur);
      }
      cur.pop();
    }
  };
  comb(arr, num, 0, []);
  return result;
}
console.log(combinations([1, 2, 3, 4], 3));
// Array(4) [ (3) […], (3) […], (3) […], (3) […] ]
​//   0: Array(3) [ 1, 2, 3 ]
//​   1: Array(3) [ 1, 2, 4 ]
​//   2: Array(3) [ 1, 3, 4 ]
​//   3: Array(3) [ 2, 3, 4 ]
/​/   length: 4

SELECT `time`, `ticker`, `price`, `volume`,
       `icon`, `tf`, `figure`, `figure_text`
  FROM `figure`
  WHERE `figure` IN ('vklin', 'nklin', 'doublev', 'doubled', 'mflag', 'bflag', 'flag')
    AND `tf` IN ('1h', '4h', '1d')
UNION SELECT `time`, `ticker`, `price`, `volume`,
       `icon`, `tf`, `situation`, `situation_text`
  FROM `levels`
  WHERE `situation` = 'resistance'
    AND `tf` IN ('1h', '4h', '1d')

SELECT `u`.*
  FROM `users` AS `u`
  LEFT JOIN `user_statuses` AS `us`
    ON `us`.`user_id` = `u`.`id` AND `us`.`status_id` = 1
  WHERE `us`.`status_id` IS NULL

SELECT *
  FROM `users`
  WHERE `id` NOT IN (
    SELECT `user_id`
      FROM `user_statuses`
      WHERE `status_id` = 1
  )

function mapper(f) {
    return ((a) => map(a, f));
}

const makeTimes = (interval, elapsedTimeMin) => {
  const deltaTimeMin = Math.ceil(elapsedTimeMin / 30) * 30;
  const startTime = new Date(interval.start);
  const endTime = new Date(interval.end);
  if (startTime.getSeconds() > 0) {
    startTime.setSeconds(60);
  }
  startTime.setMinutes(Math.ceil(startTime.getMinutes() / 30) * 30);
  const result = [];
  while (startTime <= endTime) {
    result.push(startTime.toLocaleTimeString('ru-RU', { hour: '2-digit', minute: '2-digit' }));
    startTime.setMinutes(startTime.getMinutes() + deltaTimeMin);
  }
  return result;
}

makeTimes({start: 'Tue Aug 30 2022 09:00:00', end: 'Tue Aug 30 2022 16:30:00'}, 20);
// Array(16) [ "09:00", "09:30", "10:00", "10:30", "11:00", "11:30", "12:00", "12:30", "13:00", "13:30", … ]

makeTimes({start: 'Tue Aug 30 2022 09:00:00', end: 'Tue Aug 30 2022 16:30:00'}, 40);
// Array(8) [ "09:00", "10:00", "11:00", "12:00", "13:00", "14:00", "15:00", "16:00" ]