Function choosePivot

javascript/0973-k-closest-points-to-origin.js:177–178

(points, left, right)

// Choose a pivot element of the array
const choosePivot = (points, left, right) =>
    points[left + ((right - left) >> 1)];

// Calculate and return the squared Euclidean distance
const squaredDistance = ([x, y]) => x ** 2 + y ** 2;