Query processing and transformation of array-backed data tables. Wrangle, tidy, and analyze your data.

Jeffrey Heer

UW Interactive Data Lab

Arquero

Introducing Arquero

An Illustrated Guide to Arquero Verbs

Tidy Data in JavaScript

Working with Window Queries

Arquero Cookbook

Adding Aggregate Functions to Arquero

Arquero Roll-Up and Drill-Down

Arquero Row Manipulation

Arquero and Apache Arrow

Arquero and D3

Multi-Line Chart Data Preparation

Peeking into the Gaia Star Catalog

Collection of notebooks related to data science in Observable

Observable

Data Science in Observable

Examples of how Data Scientists are using Observable

Data Science 

Excellent demonstration!
A suggestion here, to simplify (avoid the second derive) and generalize keys spreading after a fold. 
What about something like:

// ex: 'new_sp_m2534'.match(/new_([a-z]{2})_(m|f)(\d+)/)
.spread({key: d => op.jsmatch(d.key, /new_([a-z]{2})_(m|f)(\d+)/) }, { as: ['new', 'type', 'sex', 'age'] })

i know there is an op.match in Arquero, but it does not look equivalent to the js match function

Éric Mauvière

Thanks, I've added an additional example below to demonstrate this.

Great, thanks for the op.match adjustment!