how to change json data by javascript

Question

I have a Json data

   var orign = {
            users: [
                { name: "name1", id: "aaa1", classify: "depth1" },
                { name: "name2", id: "aaa2", classify: "depth1" },
                { name: "name3", id: "aaa3", classify: "depth2" },
            ]
        }

I want to change json data like this

        var result = {
            "depth1" : [
                { name: "name1", id: "aaa1"},
                { name: "name2", id: "aaa2"},
            ],
            "depth2" : [
                { name: "name3", id: "aaa3"},
            ],
           
        }

how can I change this by Javascript?

Please be aware that var orign = { ... } is not JSON, it is a JavaScript object. — evolutionxbox
– evolutionxbox, Commented Jan 5, 2021 at 12:44

Md Sabbir Alam · Accepted Answer · 2021-01-05 12:46:19Z

1

You can do the following using reduce,

origin = {
            users: [
                { name: "name1", id: "aaa1", classify: "depth1" },
                { name: "name2", id: "aaa2", classify: "depth1" },
                { name: "name3", id: "aaa3", classify: "depth2" },
            ]
        }

res = origin.users.reduce((prev, curr) => {
  const {classify, ...rest} = curr;
  if(prev.hasOwnProperty(classify)) {
    prev[classify].push(rest);
  } else {
    prev[classify] = [rest];
  }
  return prev;
}, {});

console.log(res);

answered Jan 5, 2021 at 12:46

Md Sabbir Alam

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Comments

GoonGamja · Accepted Answer · 2021-01-07 07:54:43Z

0

This is quite similar question I posted a year ago here

Hope my answer could help

var origin = {
  users: [
      { name: "name1", id: "aaa1", classify: "depth1" },
      { name: "name2", id: "aaa2", classify: "depth1" },
      { name: "name3", id: "aaa3", classify: "depth2" },
  ]
};

const reducer = (acc, item) => {
  if (!acc[item.classify]) {
    acc[item.classify] = [];    
  } 
  acc[item.classify].push({name: item.name, id: item.id})
  
  return acc
}

const result = origin.users.reduce(reducer, {});

console.log(result)

answered Jan 7, 2021 at 7:54

GoonGamja

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