排序移除list 內 重復的JSON object =>用 dedupe module

removes duplicates from your array.
$ npm install dedupe

primitive types

var dedupe = require('dedupe')



var a = [1, 2, 2, 3]

var b = dedupe(a)

console.log(b)



//result: [1, 2, 3] 

complex types

Here the string representation of the object is used for comparism. The mechanism is similar to JSON.stringifing but a bit more efficient. That means that {} is considered egal to {}.

var dedupe = require('dedupe')



var aa = [{a: 2}, {a: 1}, {a: 1}, {a: 1}]

var bb = dedupe(aa)

console.log(bb)



//result: [{a: 2}, {a: 1}] 

complex types types with custom hasher

var dedupe = require('dedupe')



var aaa = [{a: 2, b: 1}, {a: 1, b: 2}, {a: 1, b: 3}, {a: 1, b: 4}]

var bbb = dedupe(aaa, value => value.a)

console.log(bbb)



//result: [{a: 2, b: 1}, {a: 1,b: 2}]