parse array of json object into a particular format

Question

I have parsed the array of json object into a particular format but i need the "type" property value of object to to be dynamic based on condition.

    input >>
    [
      {
        "accident_description": "bike accident",
        "reported_by": "john",

      },
       {
        "accident_description": "car accident",
        "reported_by": "sam",

      }
    ]

    output >>
    "fields": [
        {
          "title": "accident_description",
          "values": "bike accident"
          "type": "generic",

        },
        {
          "title": "reported_by",
          "values": "john",
          "type": "generic",

        },
        {
          "title": "accident_description",
          "values": "car accident"
          "type": "generic",

        },
        {
          "title": "reported_by",
          "values": "sam",
          "type": "generic",

        },
      ]

I have tried this and it is working fine

const arr = [ { "accident_description": "bike accident", "reported_by": "john", }, { "accident_description": "car accident", "reported_by": "sam", } ];
 let res = arr.flatMap(x => (Object.entries(x).map(([k,v]) => ({title:k,values:v,type:"generic"}))));
   console.log(res);

but here type is fixed ,i need "type" value to dynmaic based on the condition given below.

if(title=='accident_description')
type:generic
else
type:custom

Robin Zigmond · Accepted Answer · 2019-04-22 10:00:20Z

1

Just use a ternary operator. Instead of

{title:k,values:v,type:"generic"}

do

{title:k,values:v,type:(title=='accident_description') ? 'generic' : 'custom'}

In cases where the logic is more complicated than a simple conditional, bear in mind that the arrow function which you've used in map can have arbitrary code in the body, so you can do any calculations you need and return the final type value you want.

answered Apr 22, 2019 at 10:00

Robin Zigmond

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2 Comments

Anil Kumar Moharana Over a year ago

thank you for the answer i tried your solution and it is working fine but i also need to compare that actually with another title like title=='value1'||title=='value2' and it is not working.. acn you please help me with like writing a function there for type attribute to get values based on condition . I have to compare title with 2 values.

Robin Zigmond Over a year ago

the code is more or less exactly the same in that case: type:(title=='value1' || title=='value2') ? 'generic' : 'custom'

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