0011-container-with-most-water.js

/**
 * https://leetcode.com/problems/container-with-most-water/
 * Time O(N) | Space(1)
 * @param {number[]} height
 * @return {number}
 */
var maxArea = function (height) {
    let [left, right, max] = [0, height.length - 1, 0];

    while (left < right) {
        const [leftHeight, rightHeight] = getHeights(height, left, right);
        const area = getArea(height, left, right);

        max = Math.max(max, area);

        const isRightGreater = leftHeight <= rightHeight;
        if (isRightGreater) left++;

        const isRightLess = rightHeight < leftHeight;
        if (isRightLess) right--;
    }

    return max;
};

const getHeights = (height, left, right) => [height[left], height[right]];

const getArea = (height, left, right) => {
    const [leftHeight, rightHeight] = getHeights(height, left, right);
    const _height = Math.min(leftHeight, rightHeight);
    const width = right - left;

    return _height * width;
};