I find the lack of a . makes it more visually obvious what you are doing -- sending a message. Maybe something like foo <- doSomething would be more clear, but

I find the lack of a . makes it more visually obvious what you are doing -- sending a message. Maybe something like foo <- doSomething would be more clear, but I always thought foo.doSomething sort of feels backwards, since you are sending a message to foo, not manipulating a property of it.