day_154_box_shadow.js

function boxShadows(rectangles = [[]]) {
    rectangles.sort((a, b) => a[0] - b[0]);
    // console.log(rectangles);
    let linearMap = new Map();
    for (let [x, y, width, height] of rectangles) {
        let currentWidth = linearMap.get(x);
        if (currentWidth === undefined) {
            currentWidth = width + x
        } else {
            currentWidth = x + width > currentWidth ? width : currentWidth
        }
        linearMap.set(x, currentWidth)
    }
    // getRanges(linearMap)
    let linearArray = Array.from(linearMap.entries());
    // console.log(linearArray)
    let ranges = [];
    for (let i = 0; i < linearArray.length - 1; i++) {
        for (let j = i + 1; i < linearArray.length - 1; j++) {

            let [x1, thickness1] = linearArray[i];
            let [x2, thickness2] = linearArray[j];
            if (x2 > thickness1) break;
            if (thickness1 >= thickness2) {
                linearArray.splice(j, 1);
                // ranges.push([s1, t1]);
                j--;
            } else if (thickness1 >= x2 && thickness2 > thickness1) {
                linearArray.splice(j, 1);
                // ranges.push([s1, t2]);
                linearArray[i] = [x1, thickness2];
                j--
            }
        }
    }
    // console.log(linearArray)
    return linearArray;
}

Score: 85 / 100

Correctness: 60 / 60

Code Quality: 25/40

• What do variables s1 and t1 represent? Name them better.
• remove unused variables and console statements before submitting them.
• Is the purpose of nested for loops to merge shadows? if that's the case you can sort the list and then you will have to check just the next element.