> "Arrow functions" (lambdas) existed long before CoffeeScript I think the question was about whether they existed in the JavaScript community. I'm sure much

> "Arrow functions" (lambdas) existed long before CoffeeScript I think the question was about whether they existed in the JavaScript community. I'm sure much of Typescripts great features are not completely novel nor unique—e.g. generics come from c# and Java—but it is responsible for bringing them to JavaScript.