Change object value in array if the object id has own property in other object id [duplicate]

Question

this is my data

let a = [
  {
    "activityCode": "23",
    "isValid": null
  },
  {
    "activityCode": "28",
    "isValid": null
  },
  {
    "activityCode": "32",
    "isValid": null
  }
]

let b = [
  {
    "activityCode": "23",
    "allocated": 3
  },
  {
    "activityCode": "32",
    "allocated": 2
  }
]

i want to change "isValid" to true if activityCode(a) in array has the same activityCode(b) & "isValid" to false if activityCode(a) in array has not the same activityCode(b), and the output i need like this:

let a = [
  {
    "activityCode": "23",
    "isValid": true
  },
  {
    "activityCode": "28",
    "isValid": false
  },
  {
    "activityCode": "32",
    "isValid": true
  }
]

Please help me. thanks guys.

What have you tried so far?

MorKadosh
– MorKadosh

2021-10-27 10:47:10 +00:00
Commented Oct 27, 2021 at 10:47 — MorKadosh
– MorKadosh, Commented Oct 27, 2021 at 10:47

Rohan Veer · Accepted Answer · 2021-10-27 10:47:56Z

0

Try this :

a.forEach(element => {
  element.isValid = b.some(e => e.activityCode === element.activityCode);
});
console.log(a);

answered Oct 27, 2021 at 10:47

Rohan Veer

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Comments

spiritwalker · Accepted Answer · 2021-10-27 10:47:24Z

0

a.map(aa => {
  const match = b.find(bb => bb.activityCode === aa.activityCode);
  return { activityCode: aa.activityCode, isValid: match !== undefined };
})

answered Oct 27, 2021 at 10:47

spiritwalker

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Comments

Terry Lennox · Accepted Answer · 2021-10-27 10:53:20Z

0

You can use Array.map() and Array.some() to get the desired result. If any element from a is present in array b Array.some() will return true.

let a = [ { "activityCode": "23", "isValid": null }, { "activityCode": "28", "isValid": null }, { "activityCode": "32", "isValid": null } ]
let b = [ { "activityCode": "23", "allocated": 3 }, { "activityCode": "32", "allocated": 2 } ]

const result = a.map(({ activityCode }) => ({ activityCode, isValid: b.some(el => el.activityCode === activityCode ) }));
console.log('Result:', result)

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answered Oct 27, 2021 at 10:53

Terry Lennox

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1 Comment

devin liu Over a year ago

Thank you sir, u save me today! :)

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