‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful!

Use popular 'grammar of data' syntax to filter and subset your two-dimensional JavaScript arrays and more. Here's how to use Arquero for data wrangling in Observable JavaScript and Node.js.

Because type syntax for JavaScript has come up before, and because developers offer many different opinions on how any such functionality would work, many details have yet to be fleshed out.