Beginner Exercism • javascript

Clock

Challenge Overview

Implement a clock that handles times without dates.

💡 View Solution

export class Clock {
  constructor(h, m = 0) {
    let total = (h * 60 + m) % 1440;
    if (total < 0) total += 1440;
    this.m = total;
  }
  toString() {
    const h = Math.floor(this.m / 60).toString().padStart(2, '0');
    const m = (this.m % 60).toString().padStart(2, '0');
    return h + ':' + m;
  }
  plus(m) { return new Clock(0, this.m + m); }
  minus(m) { return new Clock(0, this.m - m); }
  equals(other) { return this.m === other.m; }
}