js-deep-equals

testing of array and object deep equality (unsorted and sorted), accounting for nested arrays and nested objects

faster than JSON.stringify(x) === JSON.stringify(y) and Lodash's isEqual (benchmark code here)

unsorted arrays are compared by creating a Merkle Tree out of the input and comparing the top level hashes. hashing is done using murmur v3.

usage

npm install js-deep-equals

const { compare, compareUnsorted } = require('js-deep-equals')
const arr1 = [
  1,
  2,
  3,
  'test',
  'test2',
  'test3',
  {
    a: 12,
    b: 13,
    c: 14,
    d: [ 71, 72, 73, { 'sonested': true } ]
  }
]

// order and contents are the same as arr1
let arr2 = [
  1,
  2,
  3,
  'test',
  'test2',
  'test3',
  {
    b: 13,
    a: 12, // different order of objects is ok
    c: 14,
    d: [ 71, 72, 73, { 'sonested': true } ]
  }
]

// order of this array is different than arr1, but content is the same
let arr3 = [
  1,
  'test',
  2,
  3,
  'test2',
  {
    b: 13,
    a: 12,
    d: [ 71, 72, { 'sonested': true }, 73 ]
    c: 14,
  },
  'test3'
]

compare(arr1, arr2) // true
compare(arr1, arr3) // false
compareUnsorted(arr1, arr3) // true

License

MIT