Teemo Attacking

LeetCode題目: 495. Teemo Attacking

My solution:

/**
 * @param {number[]} timeSeries
 * @param {number} duration
 * @return {number}
 */
let findPoisonedDuration = (timeSeries, duration) => {
    let totalSeconds = 0, diff;    
    for(let i=0; i<timeSeries.length - 1; i++) {
        diff = timeSeries[i+1] - timeSeries[i];
        totalSeconds += diff > duration ? duration : diff;
    }
    return totalSeconds + duration;
};