Function _lookup

src/helpers/helpers.collection.ts:20–40

(
  table: unknown[],
  value: number,
  cmp?: (value: number) => boolean
)

  cmp: (value: number) => boolean
): {lo: number, hi: number};
export function _lookup(
  table: unknown[],
  value: number,
  cmp?: (value: number) => boolean
) {
  cmp = cmp || ((index) => table[index] < value);
  let hi = table.length - 1;
  let lo = 0;
  let mid: number;

  while (hi - lo > 1) {
    mid = (lo + hi) >> 1;
    if (cmp(mid)) {
      lo = mid;
    } else {
      hi = mid;
    }
  }

  return {lo, hi};
}

/**
 * Binary search