Convert array of objects to object using lodash

Question

I have an array of objects that i need to convert to a single object. ex:need to convert

var data=[
  {
    "name": "EMPRESA",
    "value": "CMIP"
  },
  {
    "name": "DSP_DIRECAO",
    "value": "CMIP@040@1900-01-01"
  },
  {
    "name": "DSP_DEPT",
    "value": "CMIP@040@1900-01-01@42@1900-01-01"
  },

... ]

to

   {
    "EMPRESA": "CLCA",
    "DSP_DIRECAO": "CLCA@100@1900-01-01",
    "DSP_DEPT": "CLCA@100@1900-01-01@100@1900-01-01",
    ...
  }

Turn data[x][name] to propertie and data[x][value] to atribute value Thanks

Please edit the question and add the code you've tried. The can simply be done by looping over array elements and adding key-value pairs to the object. — Tushar
– Tushar, Commented Sep 16, 2016 at 15:39

adeneo · Accepted Answer · 2016-09-16 15:54:16Z

9

Doesn't use LoDash, but a straight forward reduce()

var obj = data.reduce( (a,b) => {
    return a[b.name] = b.value, a;
}, {});

var data=[
  {
    "name": "EMPRESA",
    "value": "CMIP"
  },
  {
    "name": "DSP_DIRECAO",
    "value": "CMIP@040@1900-01-01"
  },
  {
    "name": "DSP_DEPT",
    "value": "CMIP@040@1900-01-01@42@1900-01-01"
  }
]

var obj = data.reduce( (a,b) => {
    return a[b.name] = b.value, a;
}, {});

console.log(obj);

Doing the same in LoDash would be something like

var obj = _.transform(data, (a,b) => {
    return a[b.name] = b.value, a;
},{});

edited Sep 16, 2016 at 15:54

answered Sep 16, 2016 at 15:41

adeneo

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3 Comments

Jeremy Jackson Over a year ago

Hadn't thought of that. Kudos!

guest271314 Over a year ago

Nice use of comma operator

Chris Over a year ago

The transform method doesn't need to return the accumulator like reduce does. You can do something like: const output = _.transform(data, (a, b) => a[b.name] = b.value, {});

yihangho · Accepted Answer · 2016-09-16 16:01:26Z

2

On lodash 4.15,

_.chain(data).keyBy("name").mapValues("value").value()

On lodash 3.10,

_.chain(data).indexBy("name").mapValues("value").value()

edited Sep 16, 2016 at 16:01

answered Sep 16, 2016 at 15:46

yihangho

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1 Comment

Leonel Matias Domingos Over a year ago

im using lodash 3.10 ... QuadTable.js:352 Uncaught TypeError: _.chain(...).keyBy is not a function

Jeremy Jackson · Accepted Answer · 2016-09-16 15:43:23Z

0

var newObj = {}
var data = [{
    "name": "EMPRESA",
    "value": "CMIP"
}, {
    "name": "DSP_DIRECAO",
    "value": "CMIP@040@1900-01-01"
}, {
    "name": "DSP_DEPT",
    "value": "CMIP@040@1900-01-01@42@1900-01-01"
}]
data.forEach(function(d) {
    newObj[d.name] = d.value
})

answered Sep 16, 2016 at 15:43

Jeremy Jackson

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