Can you express closures? Can I see an example of a visual closure?
You can create closures in multiple ways:
1. The simplest and most visual is by using currying! If you create a node (a visual component) and you do not connect all its required inputs, the output of the node is the curried function (function with partially applied arguments). You can then connect it to other expressions, like `map`.
2. Another way is to use expressions on nodes. You can use the lambda syntax, like `x -> x.noise` to define a lambda. You can also make it shorter by using curried operator sections `(. noise)`, and even shorter by using the Enso's operator precedence as `.noise` and use it for example as `map .noise`.
If you want to learn more about Enso syntax, we have a page describing it here: https://enso.org/docs/syntax . Also, if you go to our language-focused subpage, please check out the video named "Higher order functions". It does not show currying, but it shows the usage of the expressions on the nodes: https://enso.org/language
Did I answer your question? :)
The same is applied to our data-flow errors. Think of them like about Haskell's `Either` or Rust's `Result` types, but with automatic lifting (automatic applicative functor lifting). So in Enso, you can have a "broken value", like a string read from a file that could be broken because the file did not exist, but you can still concatenate it with other string WITHOUT using any special syntax, and the result may also be broken. In Rust and Haskell you can do the same, but with a special syntax like `(+) <$> str1 <+> str2`.
I hope it clarifies some things under the hood! :)