map[rhubarb]bool is how Go does sets and []interface{} is how Go does heterogeno... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

JulianMorrison on April 24, 2013 | parent | context | favorite | on: What Python developers need to know before migrati...

map[rhubarb]bool is how Go does sets and []interface{} is how Go does heterogenous lists.

Also you can unmarshal JSON into an interface{} variable and get a mix of map[string]interface{} and []interface{} that you can deconstruct via type assertion if you know what to expect, so you can be a bit python-ish about JSON if you don't want to read it into structs.

stevvooe on April 24, 2013 [–]

> map[rhubarb]bool is how Go does sets

Actually, you should use map[rhubarb]struct{} since a struct{} requires no storage. You can test membership with this:

    _, ok := m[strawberryRhubarb]

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact