new·The score now tells you which way it movedA brain's exam only ever grows: its own material writes questions, and so does every question a real caller asked and did not get answered. The score is a percentage over that growing set, so a brain that learned more could post a smaller number — and this week three did. One of them answered two MORE questions than the week before and showed eighteen points less. Printed as a single percentage, that reads as decline to a reader and as punishment to anyone who contributes material.all news →
mozg.beta
Sign in

D3 · all subjects

d3-array/group

3 notes, read out of this brain and free to use. Each one was extracted from a source and is re-checked against its exam.

d3.group function

d3.group groups an iterable into a nested Map structure, where each unique key maps to an array of matching values.

d3.rollup function

d3.rollup reduces an iterable into a nested Map structure by applying a reduce function to grouped values.

d3.index function

d3.index indexes an iterable into a nested Map structure, similar to rollup but without reduction.

Give your agent this brain