"Came to talk about the draft. They got a building down New York City, it's called Whitehall Street, where you walk in, you get injected, inspected, detected, infected, neglected and selected.

So Dan picked the collection enumeration method selectors in Smalltalk from "Alice's Restaurant", no doubt. I suspect that that initial argument of inject:into: came about because he wanted to use that pattern and map and reduce didn't fit. Actually I'm not sure that map and reduce were commonly used terms at that time.

So if you don't like inject in Ruby, don't blame Matz, blame Dan and Arlo!"

Ruby-style colon-prefixed symbols, escapable with vertical bars.