group-array-by v1.0.0

group-array-by

Takes an array and returns an object with values grouped into arrays by passing each value to getKey to determine to which group the value belongs.

install

$ npm install group-array-by

example

const groupBy = require('group-array-by')

groupBy(v => v.type, [
  { type: 'coffee', roast: 'light' },
  { type: 'coffee', roast: 'medium' },
  { type: 'juice', fruit: 'grape' },
  { type: 'coffee', roast: 'dark' }
])
/* => {
  coffee: [
    { type: 'coffee', roast: 'light' },
    { type: 'coffee', roast: 'medium' },
    { type: 'coffee', roast: 'dark' }
  ],
  juice: [
    { type: 'juice', fruit: 'grape' }
  ]
} */

api

groupBy(getKey, array)

• getKey(value)
  • value an item from the array
  • => key the key the item should be grouped under
• array: [] the array to group into an object
• => object the object of grouped values