DefinitelyTyped/types/kdbush/kdbush-tests.ts

import KDBush from 'kdbush';

// API
const points = [[110, 60], [130, 40]];
const index = new KDBush(points);

// Specify array constructor
const pick = (index: number) => (point: number[]) => point[index];
new KDBush(points, pick(0), pick(1), 64, Int8Array);
new KDBush(points, pick(0), pick(1), 64, Int16Array);
new KDBush(points, pick(0), pick(1), 64, Int32Array);
new KDBush(points, pick(0), pick(1), 64, Float32Array);
new KDBush(points, pick(0), pick(1), 64, Float64Array);
new KDBush(points, pick(0), pick(1), 64, Array);

// properties
index.nodeSize;
index.points;
index.ids;
index.coords;

// range
index.range(10, 10, 20, 20);
index.range(10, 10, 20, 20).map(id => points[id]);

// within
index.within(10, 10, 5);
index.within(10, 10, 5).map(id => points[id]);

// custom points (object)
const xy = [{ x: 110, y: 60 }, { x: 130, y: 40 }];
const index2: KDBush<{ x: number; y: number }> = new KDBush(xy, p => p.x, p => p.y);
index2.points[0].x;
index2.points[0].y;
index2.points.map(p => [p.x, p.y]);

// custom points (latlng)
const latlng = [[60, 110], [40, 130]];
new KDBush(latlng, p => p[1], p => p[0]);
new KDBush(latlng, p => p[1], p => p[0], 64, Int32Array);

// z coordinate (does not require Get callbacks)
const pointsZ = [[110, 60, 4000], [130, 40, 3000]];
new KDBush(pointsZ);