The following JavaScript functions provide developers with everything they need: concat () – Combines the text of two or more strings and returns a new string.

‘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.