@thi.ng/geom-accel/utils.js

n-D spatial indexing data structures with a shared ES6 Map/Set-like API

import { assert } from "@thi.ng/errors/assert";
const CMP = (a, b) => b[0] - a[0];
const __addResults = (fn, sel, acc) => {
  for (let n = sel.sort(CMP).length; n-- > 0; ) {
    const s = sel[n][1];
    s && acc.push(fn(s));
  }
  return acc;
};
const __into = (map, pairs, eps) => {
  let ok = true;
  for (let p of pairs) {
    ok = map.set(p[0], p[1], eps) && ok;
  }
  return ok;
};
const __ensureRes = (res, min = 1) => {
  for (let i = res.length; i-- > 0; )
    assert(res[i] >= min, `invalid grid res: ${res}, require min=${min}`);
};
export {
  CMP,
  __addResults,
  __ensureRes,
  __into
};