findMinMax.js

findMinMax.js

const pluck = key => list => list[key];

const pluckX = pluck('x');
const pluckY = pluck('y');

const groupXAndY = list => {
  return {
    listX: list.map(pluckX),
    listY: list.map(pluckY),
  };
}

export const findMinMax = points => {
  const { listX, listY } = groupXAndY(points);
  
  return {
    minX: Math.min(Number.MAX_SAFE_INTEGER, ...listX),
    maxX: Math.max(Number.MIN_SAFE_INTEGER, ...listX),
    minY: Math.min(Number.MAX_SAFE_INTEGER, ...listY),
    maxY: Math.max(Number.MIN_SAFE_INTEGER, ...listY),
  }
};