Make key value pair from two different array [duplicate]

Question

I'm using local storage to get an arrays of strings,

First value attrIds is as follows,

var attrIds = localStorage.getItem('attributeids');
attrIds = JSON.parse(attrIds);

Second value confOptions is as follows,

I want something like this,

144: "5595"
93: "5487"

I have tried creating a loop inside the loop and tried to set the key and value but it's not working. I have also tried to set the single JSON object as key and setting value as '' but couldn't move further with that.

Does anyone have any idea regarding this?

You want to map each value from the first array with every value of the second array from the same index? — Alexandru Corlan
– Alexandru Corlan, Commented Apr 19, 2021 at 16:11
There's no such thing as a "JSON Object". .getItem() returns a string. attrIds and confOptions are both arrays of strings. — Andreas
– Andreas, Commented Apr 19, 2021 at 16:13

Som Shekhar Mukherjee · Accepted Answer · 2021-04-19 16:17:17Z

2

Create a nested array and then use `Object.fromEntries()`.

const 
  a = ["144", "93"],
  b = ["5595", "5487"],
  c = Object.fromEntries(a.map((v, i) => [v, b[i]]));

console.log(c);

answered Apr 19, 2021 at 16:17

Som Shekhar Mukherjee

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Johann · Accepted Answer · 2021-04-19 16:14:23Z

1

You can accomplish this using a simple for loop, accessing the items from the arrays, and assigning properties to an empty object.

const keys = ['144', '93'];
const values = ['5595', '5487'];

const obj = {};
for (let i = 0; i < keys.length; i++) {
  obj[keys[i]] = values[i];
}

console.log(obj); // prints { 144: '5595', 93: '5487' }

answered Apr 19, 2021 at 16:14

Johann

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Comments

Vasi Maruseac · Accepted Answer · 2021-04-19 16:22:20Z

1

Using a for loop, you could do something like:

var attrIds = localStorage.getItem('attributeids');
attrIds = JSON.parse(attrIds);
confOptions = ["5595", "5487"]
const object = {};

for(let i=0; i<attrIds.length;i++)
object[attrIds[i]] = confOptions[i]

edited Apr 19, 2021 at 16:22

answered Apr 19, 2021 at 16:12

Vasi Maruseac

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1 Comment

Mohit Rane Over a year ago

please add a full solution with for loop, really appreciated

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Make key value pair from two different array [duplicate]

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Create a nested array and then use `Object.fromEntries()`.

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3 Answers 3

Create a nested array and then use Object.fromEntries().

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Create a nested array and then use `Object.fromEntries()`.