> Why do I need to understand how the compiler works How do you propose to master the language if you don't understand the principal tool that embodies that la

> Why do I need to understand how the compiler works How do you propose to master the language if you don't understand the principal tool that embodies that language? Of course it's always an option to use a language without really understanding it, if that's your thing. > Closures are not a complicated concept The first lectures introducing closures after their discovery had CS professors in the audience who didn't understand what they were good for. Functions could access a bunch of data outside their local scope before that.