isArray package had 18M downloads last month, has 72 dependant packages. It fits in a tweet: return toString.call(arr) == '[object Array]';
OH: "I've got a talk on .NET Core in 2 weeks. I think I'll just get up on stage and cry for 50 minutes"
“In Java we don’t use the silly C# notation of prefixing every interface with an I. We suffix the default implementation with Impl”