Intermediate Exercism • typescript

Clock

Challenge Overview

Implement a clock that handles times without dates.

💡 View Solution

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