Trapping_Rain_Water

let trap = function(height) {
    let total = 0;
    let leftMax = 0;
    for (let i = 0; i < height.length; i++) {
        let left = i;
        let right = i + 1;
        let max = Math.max(...height.slice(i, height.length));
        max = height.findIndex(num => num === max)
        if (height[i] > height[leftMax]) leftMax = i;
        while (height[left] < height[left - 1] && left > 0) {
            left--;
        }
        while (height[right] < height[right + 1] && right < height.length) {
            right++;
        }
        if (height[right] < height[max]) right = max;
        if (height[left] < height[leftMax]) left = leftMax;
        if (height[left] > height[i] && height[right] > height[i]) {
            let lowPeak = height[left] < height[right] ? height[left] : height[right];
            total += (lowPeak - height[i]);
        }
    }
    return total;
};