@aeinbu/aggregates

Lightweight and non-intrusive aggregate functions to use with array reducers

• The functions are lightweight, as they are small and don't make you bring along lots of functions you don't need.
• These functions run just as well in a browser as they do in nodejs.
• The package is non-intrusive, as it doesn't extend arrays adding new and non-standard methods to them.
  • This is done by having functions that you use with .reduce(...) on arrays.
• @types are included for better discoverability during development when you use editors with javascript/typescript intellisence support

How to install

With npm

npm install @aeinbu/aggregates

...or with yarn

yarn add @aeinbu/aggregates

Quickstart

import { maxBy, minOf, sumOf } from "@aeinbu/aggregates"

const capitals = [
    { name: 'Oslo', population: 709000 },
    { name: 'Stockholm', population: 985000 },
    { name: 'Copenhagen', population: 657000 }
]

capitals.reduce(maxBy(x => x.population), null)  // returns { name: 'Stockholm', population: 985000 }
capitals.reduce(minOf(x => x.population), null)  // returns 657000
capitals.reduce(sumOf(x => x.population), null)  // returns 2351000

Documentation

For more documentation, follow these links:

• min for minBy, minOf and min
• max for maxBy, maxOf and max
• sum for sumOf and sum

Also, look in the tests directory for more examples. The tests demonstrate at least another dozen different ways to use this library

Semantic versioning

This package follows semantic versioning (See semver.org for more info)

License

This package is published under the MIT License. (See LICENSE file for more info)