Whitney is famous for writing code like this, it's been his coding style for decades.
For example, he wrote an early J interpreter this way in 1989. There's also a buddy allocator he wrote at Morgan Stanley that's only about 10 lines of C code.
For example, he wrote an early J interpreter this way in 1989. There's also a buddy allocator he wrote at Morgan Stanley that's only about 10 lines of C code.