random-unique-subarray

Get a random subarray of the specified length with unique elements

Install

npm install random-unique-subarray

Usage

import uniqueSubarr from 'random-unique-subarray';

const arr = [1, 2, 3, 4, 5]

console.log(uniqueSubarr(arr, 2))
// => [2, 5]

console.log(uniqueSubarr(arr, 4))
// => [5, 2, 4, 3]

API

uniqueSubarr(array, number, options?)

Returns a random subarray of the specified length with unique elements

array
Type: []
Description: Array of elements from which a subarray will be created

number
Type: Number
Description: Length a created subarray

options
Type: Object

options.removeDuplicates
Type: Boolean
Default: false
Description: Flag whether to delete the same elements in array

options.key
Type: String
Default: undefined
Description: if array is array of object. We can remove any duplicate values based on this key object.
More: https://github.com/tjcafferkey/removeduplicates

Examples

const arr = [1, 2, 2]

console.log(uniqueSubarr(arr, 2))
// => [2, 2] or [1, 2]

console.log(uniqueSubarr(arr, 2, {
      removeDuplicates: true
}))
// => [1, 2]

const arr = [{
    id: 1,
    name: 'Name1'
}, {
    id: 2,
    name: 'Name2'
}, {
    id: 2,
    name: 'Name2'
}]

console.log(uniqueSubarr(arr, 2, {
    removeDuplicates: true,
    key: 'id'
}))
// => [ { id: 2, name: 'Name2' }, { id: 1, name: 'Name1' } ]