How to send an object from an object to another object?

Question

I have a list which has some cities and has an empty object at the start. I need to set my empty object named best cities to an object which contains madrid like below. it should hold madrid key too in inside. I've tried to bestCity=cities.madrid but I lost the madrid key with this method. I wonder how to make this. Thank you.

cities: {
  madrid: {
    sunny: "yes",
    capital: "yes" 
  },
  london: {
    sunny: "no",
    capital: "yes"
  },
  miami: {
    sunny: "yes",
    capital: "no"
  },
  hamburg: {
    sunny: "no",
    capital: "no",
  }
}

empty object at the start:

bestCity: {}

best city should be as below.

bestCity: {
  madrid: {
    sunny: "yes",
    capital: "yes"
  }
}

You can use destructuring {bestCity : {...cities.madrid}} ? — Code Maniac
– Code Maniac, Commented Sep 5, 2019 at 17:07

Taki · Accepted Answer · 2019-09-05 17:16:09Z

3

you could use destructuring to extract madrid then creat an object with it :

const cities = {
  madrid: {
    sunny: "yes",
    capital: "yes" 
  },
  london: {
    sunny: "no",
    capital: "yes"
  },
  miami: {
    sunny: "yes",
    capital: "no"
  },
  hamburg: {
    sunny: "no",
    capital: "no",
  }
}

const { madrid } = cities ;

const bestCity = { madrid };

console.log( bestCity );

answered Sep 5, 2019 at 17:16

Taki

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1 Comment

Kaan G Over a year ago

This was the exactly what I want to do. Thank you.

mplungjan · Accepted Answer · 2019-09-05 17:29:30Z

1

Something like this? Assuming you actually wanted to choose a good city instead of just copying a hardcoded one

const cities = { 
  madrid:  { sunny: "yes", capital: "yes" },
  london:  { sunny: "no",  capital: "yes" },
  miami:   { sunny: "yes", capital: "no"  },
  hamburg: { sunny: "no",  capital: "no", }
}

let bestCity = {};
Object.keys(cities).forEach(k => {
  const city = cities[k];
  if (city.sunny === "yes" && city.capital === "yes") bestCity[k]=city;
})
console.log(bestCity)

edited Sep 5, 2019 at 17:29

answered Sep 5, 2019 at 17:12

mplungjan

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Comments

Anis R. · Accepted Answer · 2019-09-05 17:13:13Z

0

You can use cities.madrid to access the madrid object inside cities. Then, you can assign a certain variable / object value to it like so:

bestCities = {}
bestCities.madrid = cities.madrid;

answered Sep 5, 2019 at 17:13

Anis R.

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Comments

Ezra · Accepted Answer · 2019-09-05 17:13:34Z

0

bestCity.madrid = cities.madrid;

answered Sep 5, 2019 at 17:13

Ezra

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