Shameless plug. I had experimented with Go iterators a while ago and did a https://github.com/gomoni/it https://github.com/gomoni/it It was updated to 1.23, so

Shameless plug. I had experimented with Go iterators a while ago and did a https://github.com/gomoni/it https://github.com/gomoni/it It was updated to 1.23, so it is as idiomatic as I can get. And yes it has a map method between two types. Just a single simple trick used.