如何通过添加数字从对象数组中获取唯一值

Question

I'm working in wso2 carbon dashboard. My table is containing 2 fields (Name and Number). I Have duplicate name in the objects but with different number. I want unique name with addition of numbers.

[
        {
        "Name":"Abc",
        "number":2
        },
        {
        "Name":"bcd",
        "number":3
        },
        {
        "Name":"Abc",
        "number":5
        }

]

expected output

[
{
"name":"Abc",
"Number":7
},
{
"name":"bcd",
"Number":3
}
]

I'm using java script to achieve such task. please help me

Answer 1

Use Array#reduce method with a reference object.

 var data = [{ "Name": "Abc", "number": 2 }, { "Name": "bcd", "number": 3 }, { "Name": "Abc", "number": 5 }]; // object for index reference var ref = {}; // iterate and generate the array var res = data.reduce(function(arr, o) { // check index already defined if (!(o.Name in ref)) { // if not defined then define index ref[o.Name] = arr.length; // and push the element // you can also use // arr.push({Name:o.Name, number:o.number}); arr.push(Object.assign({}, o)); } else { // if index already defined update the number arr[ref[o.Name]].number += o.number; } // return the array reference return arr; // set initial value as empty array }, []); console.log(res);