Yurii

Code Example

A function that formats a duration, given as a number of seconds, into a human-friendly format. The function accepts a non-negative integer. If the integer is zero, it returns "now". Otherwise, the duration is expressed as a combination of years, days, hours, minutes, and seconds.

  
    function formatDuration (seconds) {
      if (seconds === 0) return 'now';

      const formulas = {
        "year": 365 * 24 * 60 * 60,
        "day": 24 * 60 * 60,
        "hour": 60 * 60,
        "minute": 60,
        "second": 1
      };

      let time = [];

      for (const timeUnit in formulas) {
        if (seconds >= formulas[timeUnit]) {
          const timeAmount = Math.floor(seconds / formulas[timeUnit]);
          let timeUnitStrEnd = timeAmount > 1 ? "s" : "";
          let str = `${timeAmount} ${timeUnit}${timeUnitStrEnd}`;
          time.push(str);
          seconds %= formulas[timeUnit];
        }
      }

      if (time.length > 1) {
        const lastItem = time.pop();
        return `${time.join(', ')} and ${lastItem}`;
      } else {
        return time[0];
      }
    }