A second time I stumble upon a situation where I have a method which takes a block, and runs that block in a certain context. This is the Ruby pattern we are all familiar “with” (pun intended): with_database_connection do |conn| conn.batch_insert(records) end The most familiar usage of this pattern is, of course, with File objects - we enter a block with the opened file, and the open method then ensures that the file gets closed when we exit the block. What I found to be tricky, though, i...
