findCellsInRadius

.js

const findCellsInRadius = (w, h, center, radius) => {
	let cellsInRadius = [];
	let [centerX, centerY] = center;

	_.range(w).forEach((x) => {
		let rangeX = Math.abs(centerX - x);

		(rangeX < radius) && _.range(h).forEach((y) => {
			let rangeY = Math.abs(centerY - y);
      
			(rangeY + rangeX) <= radius && cellsInRadius.push([x,y]);
		});
	});

	return cellsInRadius;
};

console.log(findCellsInRadius(10,10, [3,3], 2))