Grouping

Grouping is a simple library for grouping items. It can be used e.g. for randomly pairing players with each other or dividing teams into groups.

Installation

For Node / NPM-based projects: npm install grouping (add -g for CLI). For browsers: use NPM and webpack or browserify.

Note: the library is written in ES2015 so it will be supported only by latest versions of Node.js and browsers.

Examples use cases

Pairing players

const grouping = require('grouping');
const players = ['Player A', 'Player B', 'Player C', 'Player D'];

grouping.group(players); // [['Player A', 'Player C'], ['Player D', 'Player B']]

Dividing teams

const grouping = require('grouping');
const teams = Array.from({ length: 16 }, (x, i) => `Team ${i+1}`);

grouping.group(teams, { maxGroupSize: 4 }); // [['Team 11', 'Team 3', 'Team 5', 'Team 7'], [...]]

Teaming up players from two baskets (DYP)

const grouping = require('grouping');
const players = {
    strong: ['Player A', 'Player B', 'Player C', 'Player D'],
    notThatStrong: ['Player E', 'Player F', 'Player G', 'Player H']; 
} 

grouping.group(players); // [['Player B', 'Player F'], ['Player C', 'Player H'], ...]

CLI

The library comes with command line interface that supports YAML files. Remember to install grouping with -g flag to take advantage of this feature.

Sample input YAML file:

- Player A
- Player B
- Player C
- Player D 

Usage:

group-items --input players.yml --output pairing.yml

Output:

- - Player B
  - Player D
- - Player A
  - Player C

Run group-items help for details.

License