The true singleton — Io's representation of boolean truth.
Evaluates the argument and returns the result.
Returns "true".
Returns true.
Returns true.
Returns true.
Does not eval argument and returns true.
Does not eval argument and returns true.
Does not eval argument and returns true.
Evaluates the argument and returns self.
Writes the receiver's code into the stream.
Does not eval argument and returns false.
Does not eval argument and returns true.
Evaluates the argument and returns nil.