How to filter array value in object javascript?

Question

I have object which contains array, I want to filter the object based on array value.

For example:

    {
       "sun":["sleep","walk"],
       "mon":["read","dance","ride"],
       "tue":["work","dance","sleep"],
    }

if I enter keyword "sleep" then result should be as follows

    {
      "sun":["sleep"],
      "tue":["sleep"],
    }

Any suggestion would be helpful

Did you try the obvious: Object.entries -> Array.filter -> Object.fromEntries? — Wyck
– Wyck, Commented Oct 15, 2020 at 16:04
@Wyck I don't have much idea about that can you please elaborate — Ravi Vishwakarma
– Ravi Vishwakarma, Commented Oct 15, 2020 at 16:06

Jasdeep Singh · Accepted Answer · 2020-10-15 16:10:07Z

1

Just iterate over the object and do the manipulations, please find working code below:

const obj = {
  "sun": ["sleep", 'walk'],
  "mon": ["read", "dance", "ride"],
  "tue": ["work", "dance", "sleep"],
}

function filterIt(filterString) {
  const result = {};
  for (const prop in obj) {
    if (obj[prop].includes(filterString)) {
      result[prop] = [filterString];
    }
  }
  return result;
}

const finalResult = filterIt('sleep');
console.log(finalResult);

answered Oct 15, 2020 at 16:10

Jasdeep Singh

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Comments

Wyck · Accepted Answer · 2020-10-15 16:13:06Z

1

Useful tools for solving this problem:

let obj =
{
  "sun": ["sleep", "walk"],
  "mon": ["read", "dance", "ride"],
  "tue": ["work", "dance", "sleep"],
};

let result = Object.fromEntries(
  Object.entries(obj)
    .filter(kvp => kvp[1].includes('sleep'))
    .map(([k, v]) => [k, v.filter(o => o === 'sleep')])
  )

console.log(result)

answered Oct 15, 2020 at 16:13

Wyck

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Comments

Fraddy · Accepted Answer · 2020-10-15 16:48:55Z

1

Using Object.keys, map, includes.

let obj ={
       "sun":["sleep","walk"],
       "mon":["read","dance","ride"],
       "tue":["work","dance","sleep"],
    }

let new_obj = {}
let search = 'sleep'

Object.keys(obj).map(key => {
     obj[key].includes(search) ? new_obj[key]=[search] : ''
})

console.log(new_obj)

answered Oct 15, 2020 at 16:48

Fraddy

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Comments

Ori Drori · Accepted Answer · 2020-10-15 18:23:31Z

You can use _.transform() to create a new object. Check if the value array (v) includes the str, and if it does assign the key with a new array that includes the str:

const fn = (obj, str) => _.transform(obj, (o, v, k) => {
  if(v.includes(str)) o[k] = [str]
})

const obj = {
  "sun":["sleep","walk"],
  "mon":["read","dance","ride"],
  "tue":["work","dance","sleep"],
}

const result = fn(obj, 'sleep')

console.log(result)

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