...sbits);
        const index = n / sbits;
        auto nth_bit = source[index] & mask;
  ...

...just need change `a[index] = cast(ubyte) i;` to `a[m-index] = cast(ubyte) i...

...void inc(int index, int r, int start, int end)
    {
        if (index == r)
        {
            // get one...

...void inc(int index, int r, int start, int end) {
        if( index == r ) {
            // get one...

...and each worker thread uses a fixed index to write into this result array variable...

...row * this.column;
    size_t index = first + column;

    return element[index];
  }

  auto opCast(R : T...

...guide anyway at https://d.minimaltype.com/index.cgi/wiki?name=statically-linked+binaries , which...

...pages didn't have a very good index so it is hard to find things...

...be ambiguity with `$` for length inside an index/slice expression when an inferred static array...

...condition to be false it requires an index position at which the elements of both...