how to transform array into different array by extracting key values using lodash

Question

How can I transform a big array into my won small array bu extracting keys and values using lodash. The given array consists of nested arrays as well.

Given array ->

goals= [       
 { name: 'ACTIONS', levers: [ { partName: 'Improve', statuses: [ { element 1 },{ element 2 }]}] },
 { name: 'DEFINITIONS', levers: [ { partName: 'Hardwork', statuses: [ { element 1 },{ element 2 }]}] }    
]

Transform in to an array below :

resultantArray = 
    [
       { name: "ACTIONS",partName: "Improve", statuses: [ { element1 }, { element2 } ] },
       { name: "DEFINITIONS",partName: "hardwork", statuses: [ { element1 }, { element2 } ] }
    ]

amuratova · Accepted Answer · 2020-07-23 10:59:01Z

2

Given the example, I'm assuming that array under levers always contains only one element.

There is no real need to use lodash to solve this, all you need is a .map method and an access to object keys.

It can be done in pure JS, as well as lodash. Below are examples how to do it in both:

Pure JS:

goals= [
    { name: 'ACTIONS', levers: [ { partName: 'Improve', statuses: [ { element: 1 },{ element: 2 }]}] },
    { name: 'DEFINITIONS', levers: [ { partName: 'Hardwork', statuses: [ { element: 1 },{ element: 2 }]}] }
]

resJS = goals.map(el => {
    return {
        name: el.name,
        partName: el.levers[0].partName,
        statuses: el.levers[0].statuses
    }
})

console.log(JSON.stringify(resJS,  undefined, 2))

Lodash:

const _ = require('lodash')

resLodash = _.map(goals, el => {
    return {
        name: _.get(el, 'name'),
        partName: _.get(el, 'levers[0].partName'),
        statuses: _.get(el, 'levers[0].statuses')
    }
})

edited Jul 23, 2020 at 10:59

answered Jul 23, 2020 at 10:45

amuratova

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2 Comments

Aditya Over a year ago

The assumption is correct but unable to view you code result.

amuratova Over a year ago

Just updated the answer and made Pure JS snippet runnable. I don't know how to create a runnable snippet using lodash though, but the output is the same.

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