Skip to content

String accessors? #189

Description

@mbostock

d3-array currently uses function accessors, e.g.

d3.median(data, d => d.foo)

What if a string could be used instead of an accessor for convenience?

d3.median(data, "foo")

There’s some precedent for this, e.g. Lodash’s _.property:

_.map(data, "foo")

(However, I don’t think we want to support nested properties as in Lodash. I think these should be simple property names with no implicit DSL.)

Here’s where it might be used:

  • d3.min
  • d3.minIndex
  • d3.max
  • d3.maxIndex
  • d3.extent
  • d3.sum
  • d3.mean
  • d3.median
  • d3.cumsum
  • d3.quantile
  • d3.quantileSorted
  • d3.variance
  • d3.deviation
  • d3.fsum
  • d3.least
  • d3.leastIndex
  • d3.greatest
  • d3.greatestIndex
  • d3.bisector
  • d3.group
  • d3.groups
  • d3.index
  • d3.indexes
  • d3.rollup
  • d3.rollups
  • d3.groupSort
  • d3.count
  • d3.every
  • d3.some
  • d3.filter
  • d3.map
  • d3.sort
  • d3.rank (only implement “low” ties strategy #236)
  • bin.value? (possibly breaking change, but why would you ever use a constant here?)

Activity

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

Labels

No labels
No labels

Type

No type

Projects

No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions