temperature

tt.js

// All the methods run in O(1) time and O(1) space
class TempTracker {
    constructor() {
        this.max = -Infinity;
        this.min = Infinity;
        this.avg = 0;

        // Keep the total insert count to be able to compute the previous sum from the average
        this.tempCount = 0;
    }

    insert(value) {
        this.max = Math.max(this.max, value);
        this.min = Math.min(this.min, value);

        const previousSum = this.avg * this.tempCount;

        this.avg = (previousSum + value) / ++this.tempCount;
    }

    getHighest() {
        return this.max;
    }

    getLowest() {
        return this.min;
    }

    getAverage() {
        return this.avg;
    }
}