Documentation

bit-or all numbers together

Concat first and second together with period in between. Eg. "hello" <.> "world" = "hello.world"

Is field's value a 1 or True (MongoDB use both Int and Bools for truth values). Error if field not in document or field not a Num or Bool.

Read N bytes from hande, blocking until all N bytes are read. If EOF is reached before N bytes then raise EOF exception.